How do I change Tile Width/Height in Aseprite?

Pyxel Edit is too…clunky, for my use, or too slow to use

I prefer when tiles are sorta symmetrical

i think you have to create another tileset but i might be wrong,

I am just sorta trying to imitate how Mr Mislav does it specifically…yeah I think Pyxel Edit’s better done with a mouse than a touchpad