NEW - Problem with Tileset

Hello everybody
I am still learning how to use Tiled.
I have a question:
I have a 48x48 tileset, but I am struggling to use it due to the margin (screenshot).
I can’t make a map because the tiles don’t match.

I delete the margin by editing the png…
Seems good

You can also set the Margin in the New Tileset dialog box, so you don’t have to edit the image.

The margin is the margin around the tileset image (what you needed to edit), and the spacing is the space between tiles.