The new modern look for the Model-driven app can be enabled from Maker Portal >> Model-driven App (Edit) >> Settings >> Upcoming – Try the new look and feel (preview). The new look makes use of the latest Fluent UI React Components. The changes include grids now having checkboxes added to it, infinite scrolling, the same grid applied to Sub Grid and Associated Grids, forms now have a new Command Bar, refreshed BPF, Sections, etc. and form fields now have a background, icon placement, styling changes, etc.
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