landing page index

Author: alex-cit

src/index.md

@@ -80,10 +80,19 @@ The ecosystem consist of various components:
    - [Selecting Single or Multiple Values ](./layer/value-select/)
    - [Photos](./layer/photos/)
    - [Informational Widgets](./layer/info-widgets/)
-- [Default Values](./layer/constraints/)
-- [Constraints](./layer/default-values/)
-- [Attributes Form Layout](./layer/form-layout/)
+- [Default Values](./layer/default-values/)
+   - [Geotagging](./layer/exif/)
+   - [Variables](./layer/variables/)
+- [Constraints](./layer/constraints/)
+- [Layout](./layer/form-layout/)
+   - [Tabs and Groups](./layer/tabs-and-groups/)
+   - [Conditional Visibility](./layer/conditional-visibility/)
 - [Use Cases](./layer/use-cases/)
+   - [How to Open a File ](./layer/open-file/)
+   - [How to Use Hyperlinks](./layer/external-link/)
+   - [How to Open a Link to a Navigation App](./layer/link-to-navigation/)
+   - [How to Link Multiple Records to One Feature](./layer/one-to-n-relations/)
+   - [How to Embed an Image](./layer/embed-image/)
 
 ## Fieldwork Tips
 - [<MobileAppName /> Interface](./field/mobile-app-ui/)