Hi Almida,
There are some previous Community posts on this topic:
- Binding a tag to “dataProvider” for dropdowns and list widgets
- Bind DataProvider of DropDownBox from SessionVar
It looks like this can be done with either OpcUA variables (which would show up in the Watch Window) or Session variables (which are handled entirely in mappView).
You mentioned that you tried something and it doesn’t work. What did you try and what issues did you run into?