Each line in the tileset configuration should start by identifying the tile you want to configure, followed by a colon, and then a list of configuration functions.
Choosing a tile is done with the format img,x,y, where img is name of the tileset image (A1, A2, B, C, etc.), and x and y are the position of that tile on the tileset. For example, A2,0,0 would be the top left A2 tile. On the outdoor tileset, this would be the grass autotile.