Grid editor options

Elsewhere it states that Grid/TreeGrid has “rich in-cell editing”, “supports various in-cell editors”, “custom components as cell editors”. Does this mean that one is able to attach the dhtmlxEditor to a “txt” cell within a data grid? Can it operate as a pop-up?

If so, where might I find documentation / sample?

Here you can find a list of available dhtmlxGrid editors:
docs.dhtmlx.com/grid__columns_types.html

There is nor ready solution for integrating with the dhtmlxEditor, but you can create your own custom editor with the required html content.
Here you can find a tutorial with some ready for use examples:
docs.dhtmlx.com/grid__columns_ty … olumntypes