Instructions: To place a tile, select the tile category below, then click on the tile you want to place to select it as the brush. Then click 'show map' and click on the grid square where you want to place it and click 'save map' to save your changes. To move a n icon, left click on it and hold down your mouse button, then drag your mouse to where you want it to go, and let go of the left mouse button. To erase a tile, click on the eraser image in the top left and then click on the tile you want to erase. The eraser will erase the top tile in each grid square with each click. If you want to erase something underneath a tile, move the tiles on top of it first, then erase it, then move them back.