diff --git a/components/src/dependencies.js b/components/src/dependencies.js
index e49aa2037..028d1f559 100644
--- a/components/src/dependencies.js
+++ b/components/src/dependencies.js
@@ -6,15 +6,15 @@ export const dependencies = {
   '[tex]/action': ['input/tex-base', '[tex]/newcommand'],
   '[tex]/autoload': ['input/tex-base', '[tex]/require'],
   '[tex]/ams': ['input/tex-base'],
-  '[tex]/ams_cd': ['input/tex-base'],
+  '[tex]/amscd': ['input/tex-base'],
   '[tex]/bbox': ['input/tex-base', '[tex]/ams', '[tex]/newcommand'],
   '[tex]/boldsymbol': ['input/tex-base'],
   '[tex]/braket': ['input/tex-base'],
   '[tex]/bussproofs': ['input/tex-base'],
   '[tex]/cancel': ['input/tex-base', '[tex]/enclose'],
   '[tex]/color': ['input/tex-base'],
-  '[tex]/colorV2': ['input/tex-base'],
-  '[tex]/configMacros': ['input/tex-base', '[tex]/newcommand'],
+  '[tex]/colorv2': ['input/tex-base'],
+  '[tex]/configmacros': ['input/tex-base', '[tex]/newcommand'],
   '[tex]/enclose': ['input/tex-base'],
   '[tex]/extpfeil': ['input/tex-base', '[tex]/newcommand', '[tex]/ams'],
   '[tex]/html': ['input/tex-base'],
@@ -24,7 +24,7 @@ export const dependencies = {
   '[tex]/noundefined': ['input/tex-base'],
   '[tex]/physics': ['input/tex-base'],
   '[tex]/require': ['input/tex-base'],
-  '[tex]/tagFormat': ['input/tex-base'],
+  '[tex]/tagformat': ['input/tex-base'],
   '[tex]/unicode': ['input/tex-base'],
   '[tex]/verb': ['input/tex-base']
 };
@@ -37,14 +37,14 @@ export const paths = {
 const allPackages = [
   '[tex]/action',
   '[tex]/ams',
-  '[tex]/ams_cd',
+  '[tex]/amscd',
   '[tex]/bbox',
   '[tex]/boldsymbol',
   '[tex]/braket',
   '[tex]/bussproofs',
   '[tex]/cancel',
   '[tex]/color',
-  '[tex]/configMacros',
+  '[tex]/configmacros',
   '[tex]/enclose',
   '[tex]/extpfeil',
   '[tex]/html',
@@ -54,6 +54,7 @@ const allPackages = [
   '[tex]/noundefined',
   '[tex]/physics',
   '[tex]/require',
+  '[tex]/tagformat',
   '[tex]/unicode',
   '[tex]/verb'
 ];
@@ -67,7 +68,7 @@ export const provides = {
     '[tex]/noundefined',
     '[tex]/require',
     '[tex]/autoload',
-    '[tex]/configMacros'
+    '[tex]/configmacros'
   ],
   'input/tex-full': [
     'input/tex-base',
@@ -76,3 +77,13 @@ export const provides = {
   ],
   '[tex]/all-packages': allPackages
 };
+
+//
+//  Compatibility with v3.0 names for TeX extensions
+//
+export const compatibility = {
+  '[tex]/amsCd': '[tex]/amscd',
+  '[tex]/colorV2': '[tex]/colorv2',
+  '[tex]/configMacros': '[tex]/configmacros',
+  '[tex]/tagFormat': '[tex]/tagformat'
+};
diff --git a/components/src/input/tex-full/build.json b/components/src/input/tex-full/build.json
index c66d0436f..626fe3290 100644
--- a/components/src/input/tex-full/build.json
+++ b/components/src/input/tex-full/build.json
@@ -8,7 +8,6 @@
     "util/entities/r.ts"
   ],
   "exclude": [
-    "input/tex/tag_format",
     "input/tex/mhchem/mhchem_parser.d.ts"
   ]
 }
diff --git a/components/src/input/tex/build.json b/components/src/input/tex/build.json
index 51f939ff6..72e5b9c9b 100644
--- a/components/src/input/tex/build.json
+++ b/components/src/input/tex/build.json
@@ -9,7 +9,7 @@
     "input/tex/noundefined",
     "input/tex/require",
     "input/tex/autoload",
-    "input/tex/config_macros",
+    "input/tex/configmacros",
     "util/entities/n.ts",
     "util/entities/p.ts",
     "util/entities/r.ts"
diff --git a/components/src/input/tex/extensions/ams_cd/amsCd.js b/components/src/input/tex/extensions/ams_cd/amsCd.js
deleted file mode 100644
index 901d237cb..000000000
--- a/components/src/input/tex/extensions/ams_cd/amsCd.js
+++ /dev/null
@@ -1 +0,0 @@
-import './lib/amsCd.js';
diff --git a/components/src/input/tex/extensions/ams_cd/build.json b/components/src/input/tex/extensions/ams_cd/build.json
deleted file mode 100644
index e5faa149b..000000000
--- a/components/src/input/tex/extensions/ams_cd/build.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "component": "input/tex/extensions/amsCd",
-  "targets": ["input/tex/ams_cd"]
-}
diff --git a/components/src/input/tex/extensions/amscd/amscd.js b/components/src/input/tex/extensions/amscd/amscd.js
new file mode 100644
index 000000000..da1ab0a95
--- /dev/null
+++ b/components/src/input/tex/extensions/amscd/amscd.js
@@ -0,0 +1,4 @@
+import './lib/amscd.js';
+import {rename} from '../../rename.js';
+
+rename('amsCd', 'amscd', true);
diff --git a/components/src/input/tex/extensions/amscd/build.json b/components/src/input/tex/extensions/amscd/build.json
new file mode 100644
index 000000000..477406992
--- /dev/null
+++ b/components/src/input/tex/extensions/amscd/build.json
@@ -0,0 +1,4 @@
+{
+  "component": "input/tex/extensions/amscd",
+  "targets": ["input/tex/amscd"]
+}
diff --git a/components/src/input/tex/extensions/color_v2/webpack.config.js b/components/src/input/tex/extensions/amscd/webpack.config.js
similarity index 85%
rename from components/src/input/tex/extensions/color_v2/webpack.config.js
rename to components/src/input/tex/extensions/amscd/webpack.config.js
index 4cb80104a..c4fa76238 100644
--- a/components/src/input/tex/extensions/color_v2/webpack.config.js
+++ b/components/src/input/tex/extensions/amscd/webpack.config.js
@@ -1,7 +1,7 @@
 const PACKAGE = require('../../../../../webpack.common.js');
 
 module.exports = PACKAGE(
-  'input/tex/extensions/colorV2',     // the package to build
+  'input/tex/extensions/amscd',       // the package to build
   '../../../../../../js',             // location of the MathJax js library
   [                                   // packages to link to
     'components/src/input/tex-base/lib',
diff --git a/components/src/input/tex/extensions/color_v2/build.json b/components/src/input/tex/extensions/color_v2/build.json
deleted file mode 100644
index 4df0bc733..000000000
--- a/components/src/input/tex/extensions/color_v2/build.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "component": "input/tex/extensions/colorV2",
-  "targets": ["input/tex/color_v2"]
-}
diff --git a/components/src/input/tex/extensions/color_v2/colorV2.js b/components/src/input/tex/extensions/color_v2/colorV2.js
deleted file mode 100644
index 7a078f3ee..000000000
--- a/components/src/input/tex/extensions/color_v2/colorV2.js
+++ /dev/null
@@ -1 +0,0 @@
-import './lib/colorV2.js';
diff --git a/components/src/input/tex/extensions/colorv2/build.json b/components/src/input/tex/extensions/colorv2/build.json
new file mode 100644
index 000000000..3923daa18
--- /dev/null
+++ b/components/src/input/tex/extensions/colorv2/build.json
@@ -0,0 +1,4 @@
+{
+  "component": "input/tex/extensions/colorv2",
+  "targets": ["input/tex/colorv2"]
+}
diff --git a/components/src/input/tex/extensions/colorv2/colorv2.js b/components/src/input/tex/extensions/colorv2/colorv2.js
new file mode 100644
index 000000000..51849b591
--- /dev/null
+++ b/components/src/input/tex/extensions/colorv2/colorv2.js
@@ -0,0 +1,4 @@
+import './lib/colorv2.js';
+import {rename} from '../rename.js';
+
+rename('colorV2', 'colorv2', false);
diff --git a/components/src/input/tex/extensions/ams_cd/webpack.config.js b/components/src/input/tex/extensions/colorv2/webpack.config.js
similarity index 85%
rename from components/src/input/tex/extensions/ams_cd/webpack.config.js
rename to components/src/input/tex/extensions/colorv2/webpack.config.js
index 384626061..cb7959bc3 100644
--- a/components/src/input/tex/extensions/ams_cd/webpack.config.js
+++ b/components/src/input/tex/extensions/colorv2/webpack.config.js
@@ -1,7 +1,7 @@
 const PACKAGE = require('../../../../../webpack.common.js');
 
 module.exports = PACKAGE(
-  'input/tex/extensions/amsCd',       // the package to build
+  'input/tex/extensions/colorv2',     // the package to build
   '../../../../../../js',             // location of the MathJax js library
   [                                   // packages to link to
     'components/src/input/tex-base/lib',
diff --git a/components/src/input/tex/extensions/config_macros/build.json b/components/src/input/tex/extensions/config_macros/build.json
deleted file mode 100644
index d5cfb23f9..000000000
--- a/components/src/input/tex/extensions/config_macros/build.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "component": "input/tex/extensions/configMacros",
-  "targets": ["input/tex/config_macros"]
-}
diff --git a/components/src/input/tex/extensions/config_macros/configMacros.js b/components/src/input/tex/extensions/config_macros/configMacros.js
deleted file mode 100644
index a6607fb6d..000000000
--- a/components/src/input/tex/extensions/config_macros/configMacros.js
+++ /dev/null
@@ -1 +0,0 @@
-import './lib/configMacros.js';
diff --git a/components/src/input/tex/extensions/configmacros/build.json b/components/src/input/tex/extensions/configmacros/build.json
new file mode 100644
index 000000000..0496ad45a
--- /dev/null
+++ b/components/src/input/tex/extensions/configmacros/build.json
@@ -0,0 +1,4 @@
+{
+  "component": "input/tex/extensions/configmacros",
+  "targets": ["input/tex/configmacros"]
+}
diff --git a/components/src/input/tex/extensions/configmacros/configmacros.js b/components/src/input/tex/extensions/configmacros/configmacros.js
new file mode 100644
index 000000000..8645dfee9
--- /dev/null
+++ b/components/src/input/tex/extensions/configmacros/configmacros.js
@@ -0,0 +1,4 @@
+import './lib/configmacros.js';
+import {rename} from '../rename.js';
+
+rename('configMacros', 'configmacros', false);
diff --git a/components/src/input/tex/extensions/config_macros/webpack.config.js b/components/src/input/tex/extensions/configmacros/webpack.config.js
similarity index 87%
rename from components/src/input/tex/extensions/config_macros/webpack.config.js
rename to components/src/input/tex/extensions/configmacros/webpack.config.js
index ef79c97dd..a7b83b2e7 100644
--- a/components/src/input/tex/extensions/config_macros/webpack.config.js
+++ b/components/src/input/tex/extensions/configmacros/webpack.config.js
@@ -1,7 +1,7 @@
 const PACKAGE = require('../../../../../webpack.common.js');
 
 module.exports = PACKAGE(
-  'input/tex/extensions/configMacros',// the package to build
+  'input/tex/extensions/configmacros',// the package to build
   '../../../../../../js',             // location of the MathJax js library
   [                                   // packages to link to
     'components/src/input/tex/extensions/newcommand/lib',
diff --git a/components/src/input/tex/extensions/rename.js b/components/src/input/tex/extensions/rename.js
new file mode 100644
index 000000000..7fe40c2f4
--- /dev/null
+++ b/components/src/input/tex/extensions/rename.js
@@ -0,0 +1,18 @@
+import {combineConfig} from '../../../../../js/components/global.js';
+
+//
+// Look for a package name in the package list and change it to a new name
+//   and rename tex options for it, if there are any.
+//
+export function rename(oname, nname, options) {
+  const tex = MathJax.config.tex;
+  if (tex && tex.packages) {
+    const packages = tex.packages;
+    const n = packages.indexOf(oname);
+    if (n >= 0) packages[n] = nname;
+    if (options && tex[oname]) {
+      combineConfig(tex, {[nname]: tex[oname]});
+      delete tex[oname];
+    }
+  }
+}
diff --git a/components/src/input/tex/extensions/tag_format/build.json b/components/src/input/tex/extensions/tag_format/build.json
deleted file mode 100644
index e6597680a..000000000
--- a/components/src/input/tex/extensions/tag_format/build.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "component": "input/tex/extensions/tagFormat",
-  "targets": ["input/tex/tag_format"]
-}
diff --git a/components/src/input/tex/extensions/tag_format/tagFormat.js b/components/src/input/tex/extensions/tag_format/tagFormat.js
deleted file mode 100644
index ed7a4b6da..000000000
--- a/components/src/input/tex/extensions/tag_format/tagFormat.js
+++ /dev/null
@@ -1 +0,0 @@
-import './lib/tagFormat.js';
diff --git a/components/src/input/tex/extensions/tagformat/build.json b/components/src/input/tex/extensions/tagformat/build.json
new file mode 100644
index 000000000..9562f5403
--- /dev/null
+++ b/components/src/input/tex/extensions/tagformat/build.json
@@ -0,0 +1,4 @@
+{
+  "component": "input/tex/extensions/tagformat",
+  "targets": ["input/tex/tagformat"]
+}
diff --git a/components/src/input/tex/extensions/tagformat/tagformat.js b/components/src/input/tex/extensions/tagformat/tagformat.js
new file mode 100644
index 000000000..17ee5137a
--- /dev/null
+++ b/components/src/input/tex/extensions/tagformat/tagformat.js
@@ -0,0 +1,4 @@
+import './lib/tagformat.js';
+import {rename} from '../rename.js';
+
+rename('tagFormat', 'tagformat', true);
diff --git a/components/src/input/tex/extensions/tag_format/webpack.config.js b/components/src/input/tex/extensions/tagformat/webpack.config.js
similarity index 85%
rename from components/src/input/tex/extensions/tag_format/webpack.config.js
rename to components/src/input/tex/extensions/tagformat/webpack.config.js
index a7189e9c6..35bb113e1 100644
--- a/components/src/input/tex/extensions/tag_format/webpack.config.js
+++ b/components/src/input/tex/extensions/tagformat/webpack.config.js
@@ -1,7 +1,7 @@
 const PACKAGE = require('../../../../../webpack.common.js');
 
 module.exports = PACKAGE(
-  'input/tex/extensions/tagFormat',   // the package to build
+  'input/tex/extensions/tagformat',   // the package to build
   '../../../../../../js',             // location of the MathJax js library
   [                                   // packages to link to
     'components/src/input/tex-base/lib',
diff --git a/components/src/input/tex/tex.js b/components/src/input/tex/tex.js
index d88aa005e..d0ba3ba93 100644
--- a/components/src/input/tex/tex.js
+++ b/components/src/input/tex/tex.js
@@ -10,7 +10,7 @@ Loader.preLoad(
   '[tex]/noundefined',
   '[tex]/require',
   '[tex]/autoload',
-  '[tex]/configMacros'
+  '[tex]/configmacros'
 );
 
 registerTeX([
@@ -20,5 +20,5 @@ registerTeX([
   'noundefined',
   'require',
   'autoload',
-  'configMacros'
+  'configmacros'
 ]);
diff --git a/components/src/source.js b/components/src/source.js
index 2072afa37..80e9a12a5 100644
--- a/components/src/source.js
+++ b/components/src/source.js
@@ -10,15 +10,15 @@ export const source = {
   '[tex]/all-packages': `${src}/input/tex/extensions/all-packages/all-packages.js`,
   '[tex]/autoload': `${src}/input/tex/extensions/autoload/autoload.js`,
   '[tex]/ams': `${src}/input/tex/extensions/ams/ams.js`,
-  '[tex]/amsCd': `${src}/input/tex/extensions/ams_cd/amsCd.js`,
+  '[tex]/amscd': `${src}/input/tex/extensions/amscd/amscd.js`,
   '[tex]/bbox': `${src}/input/tex/extensions/bbox/bbox.js`,
   '[tex]/boldsymbol': `${src}/input/tex/extensions/boldsymbol/boldsymbol.js`,
   '[tex]/braket': `${src}/input/tex/extensions/braket/braket.js`,
   '[tex]/bussproofs': `${src}/input/tex/extensions/bussproofs/bussproofs.js`,
   '[tex]/cancel': `${src}/input/tex/extensions/cancel/cancel.js`,
   '[tex]/color': `${src}/input/tex/extensions/color/color.js`,
-  '[tex]/colorV2': `${src}/input/tex/extensions/color_v2/colorV2.js`,
-  '[tex]/configMacros': `${src}/input/tex/extensions/config_macros/configMacros.js`,
+  '[tex]/colorv2': `${src}/input/tex/extensions/colorv2/colorv2.js`,
+  '[tex]/configmacros': `${src}/input/tex/extensions/configmacros/configmacros.js`,
   '[tex]/enclose': `${src}/input/tex/extensions/enclose/enclose.js`,
   '[tex]/extpfeil': `${src}/input/tex/extensions/extpfeil/extpfeil.js`,
   '[tex]/html': `${src}/input/tex/extensions/html/html.js`,
@@ -28,7 +28,7 @@ export const source = {
   '[tex]/noundefined': `${src}/input/tex/extensions/noundefined/noundefined.js`,
   '[tex]/physics': `${src}/input/tex/extensions/physics/physics.js`,
   '[tex]/require': `${src}/input/tex/extensions/require/require.js`,
-  '[tex]/tagFormat': `${src}/input/tex/extensions/tag_format/tagFormat.js`,
+  '[tex]/tagformat': `${src}/input/tex/extensions/tagformat/tagformat.js`,
   '[tex]/unicode': `${src}/input/tex/extensions/unicode/unicode.js`,
   '[tex]/verb': `${src}/input/tex/extensions/verb/verb.js`,
   'input/mml': `${src}/input/mml/mml.js`,
diff --git a/components/src/startup/startup.js b/components/src/startup/startup.js
index cbdf49642..7472aafb5 100644
--- a/components/src/startup/startup.js
+++ b/components/src/startup/startup.js
@@ -2,11 +2,12 @@ import './lib/startup.js';
 
 import {Loader, CONFIG} from '../../../js/components/loader.js';
 import {combineDefaults} from '../../../js/components/global.js';
-import {dependencies, paths, provides} from '../dependencies.js';
+import {dependencies, paths, provides, compatibility} from '../dependencies.js';
 
 combineDefaults(MathJax.config.loader, 'dependencies', dependencies);
 combineDefaults(MathJax.config.loader, 'paths', paths);
 combineDefaults(MathJax.config.loader, 'provides', provides);
+combineDefaults(MathJax.config.loader, 'source', compatibility);
 
 Loader.preLoad('loader');
 
diff --git a/ts/input/tex/AllPackages.ts b/ts/input/tex/AllPackages.ts
index 377131c41..7515cbe53 100644
--- a/ts/input/tex/AllPackages.ts
+++ b/ts/input/tex/AllPackages.ts
@@ -24,15 +24,15 @@
 import './base/BaseConfiguration.js';
 import './action/ActionConfiguration.js';
 import './ams/AmsConfiguration.js';
-import './ams_cd/AmsCdConfiguration.js';
+import './amscd/AmsCdConfiguration.js';
 import './bbox/BboxConfiguration.js';
 import './boldsymbol/BoldsymbolConfiguration.js';
 import './braket/BraketConfiguration.js';
 import './bussproofs/BussproofsConfiguration.js';
 import './cancel/CancelConfiguration.js';
 import './color/ColorConfiguration.js';
-import './color_v2/ColorV2Configuration.js';
-import './config_macros/ConfigMacrosConfiguration.js';
+import './colorv2/ColorV2Configuration.js';
+import './configmacros/ConfigMacrosConfiguration.js';
 import './enclose/EncloseConfiguration.js';
 import './extpfeil/ExtpfeilConfiguration.js';
 import './html/HtmlConfiguration.js';
@@ -41,7 +41,7 @@ import './newcommand/NewcommandConfiguration.js';
 import './noerrors/NoErrorsConfiguration.js';
 import './noundefined/NoUndefinedConfiguration.js';
 import './physics/PhysicsConfiguration.js';
-import './tag_format/TagFormatConfiguration.js';
+import './tagformat/TagFormatConfiguration.js';
 import './unicode/UnicodeConfiguration.js';
 import './verb/VerbConfiguration.js';
 
@@ -50,14 +50,14 @@ if (typeof MathJax !== 'undefined' && MathJax.loader) {
   MathJax.loader.preLoad(
     '[tex]/action',
     '[tex]/ams',
-    '[tex]/amsCd',
+    '[tex]/amscd',
     '[tex]/bbox',
     '[tex]/boldsymbol',
     '[tex]/braket',
     '[tex]/bussproofs',
     '[tex]/cancel',
     '[tex]/color',
-    '[tex]/color_v2',
+    '[tex]/colorv2',
     '[tex]/enclose',
     '[tex]/extpfeil',
     '[tex]/html',
@@ -68,8 +68,8 @@ if (typeof MathJax !== 'undefined' && MathJax.loader) {
     '[tex]/physics',
     '[tex]/unicode',
     '[tex]/verb',
-    '[tex]/configMacros',
-    '[tex]/tagFormat'
+    '[tex]/configmacros',
+    '[tex]/tagformat'
   );
 }
 
@@ -77,7 +77,7 @@ export const AllPackages: string[] = [
   'base',
   'action',
   'ams',
-  'amsCd',
+  'amscd',
   'bbox',
   'boldsymbol',
   'braket',
@@ -93,6 +93,6 @@ export const AllPackages: string[] = [
   'noundefined',
   'unicode',
   'verb',
-  'configMacros',
-  'tagFormat'
+  'configmacros',
+  'tagformat'
 ];
diff --git a/ts/input/tex/ams_cd/AmsCdConfiguration.ts b/ts/input/tex/amscd/AmsCdConfiguration.ts
similarity index 89%
rename from ts/input/tex/ams_cd/AmsCdConfiguration.ts
rename to ts/input/tex/amscd/AmsCdConfiguration.ts
index 5df68e49d..9ff13231f 100644
--- a/ts/input/tex/ams_cd/AmsCdConfiguration.ts
+++ b/ts/input/tex/amscd/AmsCdConfiguration.ts
@@ -27,14 +27,14 @@ import './AmsCdMappings.js';
 
 
 export const AmsCdConfiguration = Configuration.create(
-  'amsCd', {
+  'amscd', {
     handler: {
-      character: ['amsCd_special'],
-      macro: ['amsCd_macros'],
-      environment: ['amsCd_environment']
+      character: ['amscd_special'],
+      macro: ['amscd_macros'],
+      environment: ['amscd_environment']
     },
     options: {
-      amsCd: {
+      amscd: {
         colspace: '5pt',
         rowspace: '5pt',
         harrowsize: '2.75em',
diff --git a/ts/input/tex/ams_cd/AmsCdMappings.ts b/ts/input/tex/amscd/AmsCdMappings.ts
similarity index 86%
rename from ts/input/tex/ams_cd/AmsCdMappings.ts
rename to ts/input/tex/amscd/AmsCdMappings.ts
index 6aa7aa155..8412105b3 100644
--- a/ts/input/tex/ams_cd/AmsCdMappings.ts
+++ b/ts/input/tex/amscd/AmsCdMappings.ts
@@ -27,12 +27,12 @@ import ParseMethods from '../ParseMethods.js';
 import AmsCdMethods from './AmsCdMethods.js';
 
 
-new sm.EnvironmentMap('amsCd_environment', ParseMethods.environment,
+new sm.EnvironmentMap('amscd_environment', ParseMethods.environment,
                       {CD: 'CD'}, AmsCdMethods);
 
-new sm.CommandMap('amsCd_macros', {
+new sm.CommandMap('amscd_macros', {
   minCDarrowwidth: 'minCDarrowwidth',
   minCDarrowheight: 'minCDarrowheight',
 }, AmsCdMethods);
 
-new sm.MacroMap('amsCd_special', {'@': 'arrow'}, AmsCdMethods);
+new sm.MacroMap('amscd_special', {'@': 'arrow'}, AmsCdMethods);
diff --git a/ts/input/tex/ams_cd/AmsCdMethods.ts b/ts/input/tex/amscd/AmsCdMethods.ts
similarity index 98%
rename from ts/input/tex/ams_cd/AmsCdMethods.ts
rename to ts/input/tex/amscd/AmsCdMethods.ts
index 18ae10f4d..85ca64271 100644
--- a/ts/input/tex/ams_cd/AmsCdMethods.ts
+++ b/ts/input/tex/amscd/AmsCdMethods.ts
@@ -45,7 +45,7 @@ let AmsCdMethods: Record<string, ParseMethod> = {};
 AmsCdMethods.CD = function(parser: TexParser, begin: StackItem) {
   parser.Push(begin);
   let item = parser.itemFactory.create('array') as ArrayItem;
-  let options = parser.configuration.options.amsCd;
+  let options = parser.configuration.options.amscd;
   item.setProperties({
     minw: parser.stack.env.CD_minw || options.harrowsize,
     minh: parser.stack.env.CD_minh || options.varrowsize
@@ -128,7 +128,7 @@ AmsCdMethods.arrow = function(parser: TexParser, name: string) {
           let nodeB = new TexParser(b, parser.stack.env, parser.configuration).mml();
           NodeUtil.setChild(mml, mml.under, parser.create('node', 'mpadded', [nodeB], pad));
         }
-          if (parser.configuration.options.amsCd.hideHorizontalLabels) {
+          if (parser.configuration.options.amscd.hideHorizontalLabels) {
             mml = parser.create('node', 'mpadded', mml, {depth: 0, height: '.67em'});
           }
         }
diff --git a/ts/input/tex/autoload/AutoloadConfiguration.ts b/ts/input/tex/autoload/AutoloadConfiguration.ts
index 1897f8023..0c9f1dfec 100644
--- a/ts/input/tex/autoload/AutoloadConfiguration.ts
+++ b/ts/input/tex/autoload/AutoloadConfiguration.ts
@@ -133,7 +133,7 @@ const AutoloadEnvironments = new AutoloadCommandMap('autoload-environments', {},
 
 
 /**
- * The configuration object for configMacros
+ * The configuration object for configmacros
  */
 export const AutoloadConfiguration = Configuration.create(
   'autoload', {
@@ -151,7 +151,7 @@ export const AutoloadConfiguration = Configuration.create(
       //
       autoload: expandable({
         action: ['toggle', 'mathtip', 'texttip'],
-        amsCd: [[], ['CD']],
+        amscd: [[], ['CD']],
         bbox: ['bbox'],
         boldsymbol: ['boldsymbol'],
         braket: ['bra', 'ket', 'braket', 'set', 'Bra', 'Ket', 'Braket', 'Set', 'ketbra', 'Ketbra'],
diff --git a/ts/input/tex/color_v2/ColorV2Configuration.ts b/ts/input/tex/colorv2/ColorV2Configuration.ts
similarity index 94%
rename from ts/input/tex/color_v2/ColorV2Configuration.ts
rename to ts/input/tex/colorv2/ColorV2Configuration.ts
index c5cdab8b7..ca7ef8816 100644
--- a/ts/input/tex/color_v2/ColorV2Configuration.ts
+++ b/ts/input/tex/colorv2/ColorV2Configuration.ts
@@ -54,11 +54,11 @@ export const ColorV2Methods: Record<string, ParseMethod> = {
 /**
  * The color macros
  */
-new CommandMap('colorV2', {color: 'Color'}, ColorV2Methods);
+new CommandMap('colorv2', {color: 'Color'}, ColorV2Methods);
 
 /**
  * The configuration for the color macros
  */
 export const ColorConfiguration = Configuration.create(
-  'colorV2', {handler: {macro: ['colorV2']}}
+  'colorv2', {handler: {macro: ['colorv2']}}
 );
diff --git a/ts/input/tex/config_macros/ConfigMacrosConfiguration.ts b/ts/input/tex/configmacros/ConfigMacrosConfiguration.ts
similarity index 82%
rename from ts/input/tex/config_macros/ConfigMacrosConfiguration.ts
rename to ts/input/tex/configmacros/ConfigMacrosConfiguration.ts
index e058ae082..85aa3f65a 100644
--- a/ts/input/tex/config_macros/ConfigMacrosConfiguration.ts
+++ b/ts/input/tex/configmacros/ConfigMacrosConfiguration.ts
@@ -17,7 +17,7 @@
 
 
 /**
- * @fileoverview    Configuration file for the config-macros package.
+ * @fileoverview    Configuration file for the configmacros package.
  *
  * @author dpvc@mathjax.org (Davide P. Cervone)
  */
@@ -32,16 +32,16 @@ import {TeX} from '../../tex.js';
 /**
  * The name to use for the macros map
  */
-const MACROSMAP = 'configMacrosMap';
+const MACROSMAP = 'configmacros-map';
 
 /**
  * Create the command map for the macros
  *
  * @param {Configuration} config   The configuration object for the input jax
  */
-function configMacrosInit(config: Configuration) {
+function configmacrosInit(config: Configuration) {
   new CommandMap(MACROSMAP, {}, {});
-  config.append(Configuration.create('configMacroDefinitions', {handler: {macro: [MACROSMAP]}}));
+  config.append(Configuration.create('configmacros-definitions', {handler: {macro: [MACROSMAP]}}));
 }
 
 /**
@@ -50,7 +50,7 @@ function configMacrosInit(config: Configuration) {
  * @param {Configuration} config   The configuration object for the input jax
  * @param {TeX} jax                The TeX input jax
  */
-function configMacrosConfig(_config: Configuration, jax: TeX<any, any, any>) {
+function configmacrosConfig(_config: Configuration, jax: TeX<any, any, any>) {
   const macrosMap = jax.parseOptions.handlers.retrieve(MACROSMAP) as CommandMap;
   const macros = jax.parseOptions.options.macros;
   for (const cs of Object.keys(macros)) {
@@ -63,12 +63,12 @@ function configMacrosConfig(_config: Configuration, jax: TeX<any, any, any>) {
 }
 
 /**
- * The configuration object for configMacros
+ * The configuration object for configmacros
  */
 export const ConfigMacrosConfiguration = Configuration.create(
-  'configMacros', {
-    init: configMacrosInit,
-    config: configMacrosConfig,
+  'configmacros', {
+    init: configmacrosInit,
+    config: configmacrosConfig,
     options: {macros: expandable({})}
   }
 );
diff --git a/ts/input/tex/require/RequireConfiguration.ts b/ts/input/tex/require/RequireConfiguration.ts
index 6aa330da9..2f66cabe8 100644
--- a/ts/input/tex/require/RequireConfiguration.ts
+++ b/ts/input/tex/require/RequireConfiguration.ts
@@ -44,7 +44,7 @@ const MJCONFIG = MathJax.config;
  * Add an extension to the configuration, and configure its user options
  *
  * @param {TeX} jax       The TeX jax whose configuration is to be modified
- * @param {string} name   The name of the extension being added (e.g., '[tex]/amsCd')
+ * @param {string} name   The name of the extension being added (e.g., '[tex]/amscd')
  */
 function RegisterExtension(jax: TeX<any, any, any>, name: string) {
   const require = jax.parseOptions.options.require;
diff --git a/ts/input/tex/tag_format/TagFormatConfiguration.ts b/ts/input/tex/tagformat/TagFormatConfiguration.ts
similarity index 90%
rename from ts/input/tex/tag_format/TagFormatConfiguration.ts
rename to ts/input/tex/tagformat/TagFormatConfiguration.ts
index 5eff16352..984ec9b5e 100644
--- a/ts/input/tex/tag_format/TagFormatConfiguration.ts
+++ b/ts/input/tex/tagformat/TagFormatConfiguration.ts
@@ -38,7 +38,7 @@ let tagID = 0;
  * @param {Configuration} config   The configuration for the input jax
  * @param {TeX} jax                The TeX input jax
  */
-export function tagFormatConfig(config: Configuration, jax: TeX<any, any, any>) {
+export function tagformatConfig(config: Configuration, jax: TeX<any, any, any>) {
 
   /**
    * If the tag format is being added by one of the other extensions,
@@ -67,28 +67,28 @@ export function tagFormatConfig(config: Configuration, jax: TeX<any, any, any>)
      * @override
      */
     public formatNumber(n: number) {
-      return jax.parseOptions.options.tagFormat.number(n);
+      return jax.parseOptions.options.tagformat.number(n);
     }
 
     /**
      * @override
      */
     public formatTag(tag: string) {
-      return jax.parseOptions.options.tagFormat.tag(tag);
+      return jax.parseOptions.options.tagformat.tag(tag);
     }
 
     /**
      * @override
      */
     public formatId(id: string) {
-      return jax.parseOptions.options.tagFormat.id(id);
+      return jax.parseOptions.options.tagformat.id(id);
     }
 
     /**
      * @override
      */
     public formatUrl(id: string, base: string) {
-      return jax.parseOptions.options.tagFormat.url(id, base);
+      return jax.parseOptions.options.tagformat.url(id, base);
     }
   }
 
@@ -110,11 +110,11 @@ export function tagFormatConfig(config: Configuration, jax: TeX<any, any, any>)
  * The configuration object for configTags
  */
 export const TagFormatConfiguration = Configuration.create(
-  'tagFormat', {
-    config: tagFormatConfig,
+  'tagformat', {
+    config: tagformatConfig,
     configPriority: 10,
     options: {
-      tagFormat: {
+      tagformat: {
         number: (n: number) => n.toString(),
         tag:    (tag: string) => '(' + tag + ')',
         id:     (id: string) => 'mjx-eqn-' + id.replace(/\s/g, '_'),