Timelion deprecation doc

docs/user/visualize.asciidoc

@@ -132,6 +132,7 @@ include::{kib-repo-dir}/visualize/lens.asciidoc[]
 include::{kib-repo-dir}/visualize/most-frequent.asciidoc[]
 
 include::{kib-repo-dir}/visualize/tsvb.asciidoc[]
+
 include::{kib-repo-dir}/visualize/timelion.asciidoc[]
 
 include::{kib-repo-dir}/visualize/tilemap.asciidoc[]

docs/visualize/timelion.asciidoc

@@ -504,3 +504,61 @@ image::images/timelion-conditional04.png[]
 {nbsp}
 
 For additional information on Timelion conditional capabilities, go to https://www.elastic.co/blog/timeseries-if-then-else-with-timelion[I have but one .condition()].
+
+[float]
+[[timelion-deprecation]]
+=== Timelion App deprecation
+
+In *8.0* and later, the Timelion app is going to be deprecated. There are actions you need to complete to copy your existing Timelion worksheets to a dashboard.  
+
+NOTE: Only the Timelion app is deprecated, not the Timelion editor. 
+
+[role="screenshot"]
+image::images/timelion-app.png[]
+{nbsp}
+
+[float]
+[[timelion-app-to-vis]]
+==== Create Timelion visualizations from a Timelion worksheet
+
+To migrate your Timelion charts to **Visualize**, copy the expression of each graph and create a new Timelion Visualization.
+
+Select the chart you want to copy, and copy its expression.
+
+[role="screenshot"]
+image::images/timelion-copy-expression.png[]
+{nbsp}
+
+Open the menu, click **Visualize**, then click **Create visualization**. On the **New Visualization** window, click **Timelion**.
+
+[role="screenshot"]
+image::images/timelion-create-new-vis.png[]
+{nbsp}
+
+Paste the copied expression to the *Timelion Expression* field and click **Update**.
+
+[role="screenshot"]
+image::images/timelion-vis-paste-expression.png[]
+{nbsp}
+
+Save the new visualization and repeat for all your charts on each sheet.
+
+[float]
+[[timelion-sheet-to-dashboard]]
+==== Create a dashboard with the Timelion visualizations
+
+Timelion worksheets are deprecated, but they can easily be replaced by a dashboard. The process is the same as adding a new visualization to a dashboard.
+
+Open the menu, click **Dashboard**, then click **Create dashboard**.
+
+Click to Add an existing visualization to the dashboard.
+
+[role="screenshot"]
+image::images/timelion-add-to-dashboard.png[]
+{nbsp}
+
+On the dashboard, click **Add an existing**, then select the Timelion visualizations.
+
+[role="screenshot"]
+image::images/timelion-dashboard.png[]
+{nbsp}