Tiled Mode for only one tile in a tilemap layer


I would like a new tiled mode, that would work similarly to how tiled mode works in a regular layer, but that works in a tilemap layer. It would, instead of repeating the whole tilemap layer, just repeat the single tile I’m hovering over, with 8 repeat tiles around it. That way, I can create new single tiles using tiled mode, but store many tiles in my tilemap layer.