toc updates

_toc.yml

@@ -25,16 +25,17 @@
 - part: Differentiable Physics
   chapters:
   - file: diffphys.md
-    sections:
-      - file: diffphys-code-burgers.ipynb
-      - file: diffphys-discuss.md
-      - file: diffphys-code-ns.ipynb
-      - file: diffphys-dpvspinn.md
+  - file: diffphys-code-burgers.ipynb
+  - file: diffphys-discuss.md
+  - file: diffphys-code-ns.ipynb
+  - file: diffphys-dpvspinn.md
+
+- part: Complex Examples with DP
+  chapters:
   - file: diffphys-examples.md
-    sections:
-      - file: diffphys-code-sol.ipynb
-      - file: diffphys-control.ipynb
-      - file: diffphys-outlook.md
+  - file: diffphys-code-sol.ipynb
+  - file: diffphys-control.ipynb
+  - file: diffphys-outlook.md
 
 - part: Physical Gradients
   chapters:

diffphys-examples.md

@@ -1,4 +1,4 @@
-Complex Examples with DP
+Complex Examples Overview
 =======================
 
 The following two sections with show code examples of two more complex cases that 

diffphys.md

@@ -1,4 +1,4 @@
-Differentiable Physics
+Introduction to Differentiable Physics
 =======================
 
 As a next step towards a tighter and more generic combination of deep learning

physgrad-nn.md

@@ -122,7 +122,7 @@ these updates.
 ```{figure} resources/placeholder.png
 ---
 height: 220px
-name: pg-training
+name: pg-toolbox
 ---
 TODO, visual overview of toolbox  , combinations 
 ```