Skeetendo

I searched about it and I've found the Header & Tileset document posted by (IIMarkus? It was posted many times by different users, I dunno.

But, in that document, collision data for a tileset aren't explained in detail... so, how works collision data for each tile?

I mean, how I could make a tile change\edit its behaviour, like, for example, make a tile non-solid & able to walk on, and make a stair block teleport with the teleport pad animation instead of the usual black-on when there's a warp on it?