Hello Fred,
- Navigate to the screen which you want to modify and enter the "Adaptation Mode" from the menu "Adapt".
- As you want to modify the elements of the query -> Click on "Show Advanced Filter"
Only those fields which are visible can be modify by the Adaptation Mode - Select "Edit Screen"
- First select "Extension Fields" and then chose the "Personalization" section
- Mark the required field(s) in the "List of Fields" (here "TestExt2") and they will appear in the Advanced Filter
- Finally "Publish" your changes
HTH,
Horst