This screen allows you to select a maptile to use in the map editor. Use the arrow keys to highlight a maptile, and press ENTER or SPACE to choose it, or CLICK on it. RIGHT CLICK to move the cursor.

Hold down ENTER or SPACE and move the cursor, or LEFT CLICK and drag, to select multiple tiles to paint with as a brush for the Clone tool. All the tiles will be placed on the current map layer when painting with this brush.

Hold SHIFT to move the cursor faster.

Press A to toggle whether animated tile sets (if defined) are
shown below the tileset (scroll down). By default they aren't.