Tile Mapping Settings

When creating a new tile map project from an image then you can modify tile with and height, otherwise these edit fields are disabled.
Tile mirroring will make the tile map engine to recognize mirrored tiles. Instead of adding a new tile that is just a vertical and/or horizontal mirror of a tile already present in the tile set, this existing tile will be displayed mirrored.

The 0-Tile has a fill color that is typically set to be the project's transparent color.

Related topics

Menu Tile Mapping
Tile Mapping Primer