Add some docs on toc.depth setting

configuration/project.md

@@ -1680,12 +1680,31 @@ The `toc` config contains project options that apply to the right sidebar Table
 ### depth
 
 === [!badge PRO] depth : `string`, `number`
+The heading depth to include in the right Table of Contents.
+
 The default is `2-3`.
 
 ```yml
 toc:
   depth: 2-3
 ```
+
+The `toc` can be configured at the Project or Page levels.
+
+Configuring the `toc` at the Page level overrides the Project level settings.
+
+Acceptable values for `depth` include:
+
+Value | Description
+--- | ---
+2 | Include `H2` headings only
+2-3 | `default` Include `H2` to `H3` headings
+1-4 | Include `H1` to `H3` headings
+2,3 | Include `H2` and `H3` headings
+2,4 | Include `H2` and `H4` headings
+1,3-4 | Include `H1` and `H3` to `H4` headings, skip `H2`
+1,2,3,4 | Include `H1`, `H2`, `H3`, and `H4` headings
+
 ===
 
 ### label