Sorry for the late reply 🙏
The tilesets (if you already have one available in the form of Sprite sheet) can be imported through File>Import. After import is successful, tilesets will appear in Project menu>Project properties.
When making a new TileMap layer, a dialog will appear, in this dialog, you will be given an option of
- Either using the tileset you imported.
- Making a new one from scratch.
If you want to use a different tileset later, then that can happen as well. (You can switch between which tileset is used by the layer at any time)
After creating the Tilemap Layer, a new panel will be visible
From here on you can check this tutorial, it's for Aseprite but pixelorama does the exact same thing, the exact same way😁.
Hope this helps 😄