up/down to exit grid cell edit mode and move to prev/next item
On my desktop, if a grid cell is in edit mode, and the cursor is on the top/bottom line of the grid cell text, up/down will exit edit mode and the prev/next item will be highlighted (not put in edit mode though).
On my laptop, up/down on the top/bottom line of the cell being edited has no effect. The current grid cell remains in Edit mode and the cursor remains at the same location.
Both desktop and laptop are set to edit in non-WYSIWYG mode.
I thought this might be controlled by an option in Tools > Options, but I didn't find such an option.