I've bought a bucket load of his tiles. I have a few tricks that I use to line up maps. It's a joy when they all line up. I start out by turning the grid on the page red, and increase the opacity to 75% Then, drop the tile in. Then, select the tile, right click > Advanced > align to grid. The align to grid tool wants you to select a 3x3 grid pattern that is drawn on the map. Once you select a box shape from the 3x3 grid that you see (anywhere) the next dialog box will pop up to make sure you select the right settings. It will report a number of pixels by a number of pixels. Since you know the tile is square, I would make sure that the pixels it is showing you are the same in both places. That usually gets it really close. The tile should stretch to almost meet the dimensions of your grid. Then you can turn down the grid and make it less shiny color. Optionally, Here's something that I discovered recently. Why do I need a grid? I use the grid to set things up and make things line up perfectly for monsters and other objects, but when I am in a session, I have been turning the grid off so players aren't required to stay exactly in the grid. The world doesn't have a grid. the grid is really there to help us measure movement during high speed combat, but we aren't required to snap to the grid. Hope it helps!