The text discusses a method of editing subgrids within Model Driven Apps. This new approach uses side-by-side editing via Side Panes, providing a unique user experience that enables editing on both sides of the screen simultaneously. Users can open the records of a subgrid in a dialog with several online resources offered for further reading such as Carl de Souza's blog for Editable Grid and Dani Kahil's resource on the new "Power Apps grid control".
The innovative use of side-by-side editing in Model Driven Apps fundamentally enhances the user interface. It allows for the efficient use of both sides of the screen for an improved editing experience. Notably, Side Panes enable the concurrent opening of Dialogs without covering the form below, offering a more productive interface. The implementation of this technique requires the assignment of a unique ID to the Side Pane. This ID ensures that the same window is reused for each record from the subgrid, thus optimizing user interactions in the Model Driven App.