that is, so that the field consists entirely of objects, as in boulder dash
If you’re not planning to add any custom properties to this particular object, then I’d suggest using a Tile Layer instead of an Object Layer to place it. What you do with it in your game (like, if it’s a Boulder Dash where you need to move the tiles around in the game), is up to you.
If you really need the tile to be placed as an object, even if you always want them placed on the grid, enable “Snap to Grid” in the “View > Snapping” menu.
Thx, bjorn! This is what I was looking for