Merge pull request #719 from ljhwang/patch-36

Update 08_passive_margin_variable_depth.md

doc/sphinx/user_manual/basic_starter_tutorial/08_passive_margin_variable_depth.md

@@ -10,9 +10,9 @@ To showcase this, we will be adding a passive margin to our model at the overrid
 For an example of what this looks like in technical terms, see {ref}`open_features_items_oneOf_1_max-depth`.
 ```
 
-The number input we have seen before, and just sets the maximum depth to a single value. The value at points system works a bit differently, but can be used to achieve the same result. To start out easy, this is exactly what we are going to to for the `max depth` of the continental feature. 
+The number input we have seen before and it sets the maximum depth of the feature to a single value. The value at points system works a bit differently and can be used to achieve the same result. To start, this is exactly what we are going to to for the `max depth` of the continental feature. 
 
-The value at points system  creates a list of points, which at least include all the edge points of an object and assigns a value to them. Then to get the actual value at the rest of the points, `max depth` in our case, an interpolation between some close points is performed to get the value at that point. 
+The value at points system creates a list of points that includes all the initial edge points of an object and assigns a value to them. We then interpolate between close points to obtain the actual values at the remaining points according to the model type, e.g., linearly to the points set in `max depth` below.
 
 Below are two examples of how to first set the depth of two points to 200 km, and then an example of how to also set a third point to a value of 100 km.
 
@@ -87,4 +87,4 @@ If you provide a point twice, explicitly, or implicitly through the use of the c
 :align: center
 
 Basic Starter Tutorial section 8. The top part of the figure shows where the composition as been assigned as an object. Currently it shows composition 0 as green, composition 1 as yellow and composition 3 as blue. The bottom part shows the temperature as seen slightly from below where only temperatures between 300K and 1600K are shown. The added continental plate with variable thickness of it's two layers is now visible on the left side of the image.
-```
+```