I'm unsure if this is possible, but I have 2 faces that make an L shape. I'd like to make them one surface, but I'm not sure how. The "f" key solution I've found online doesn't seem to work (where you dissolve the edge), I know it's not a box shape and that everything needs to be made up of triangles when all is said and done.
Any help is appreciated.
Additional info: Trying to make a game tray for 3d printing, so I'm operating under the assumption that all of these pieces have to be merged in to one chunk.
The two highlighted (orange) parts are the pieces I'm trying to join. Basically two boxes, one is a shorter box. I've Joined them, and went to edit them, but I'm not sure what to do from there