ShortCuts Two shortcuts are provided for your convenience: Hold down the ‘1’ key to allow painting over an existing tile. See “Brush Inspector,” below. Hold down Alt+1 (CMD+1 on Mac) to drag a Grid Selection when Painter is active. These can be modified in the Unity Shortcut manager (Edit/Shortcuts) in the TilePlus category. Tile+Painter has numerous shortcuts of its own, largely emulating those of the Unity Palette editor window but with ALT (Option on Mac) added.