Grid align problem

when i load my tile picture, the grid is not align with the picture like this

Sans titre

Seems like you picked the wrong tile size when you set up your tileset.

You can change the tile size of your tileset when you edit the tileset (by clicking the small “Edit Tileset” button below the tileset view, and clicking “Edit…” after selecting the value of the “Image” property in the Tileset Properties).