Reply To: Why can I delete but not disolve a cilinder cap?
It’s not a join kind of function. In your example, you have 2 edges and 3 vertices that are removed. The dissolve then takes and follows the edges that aren’t selected to the vertices that are connected to them and re-attaches the N-gon(Face) to those vertices. If you just just wanted to remove the vertex in the middle then you would select the one edge going up and down(Green line) from it. This will connect the 2 vertices going left and right at the top of the edge and at the bottom.(Red Lines). Basically what you did was select those 3 vertices and pressed gg and edge slide them to the vertices above them and then merged them.
