Is there a quick way to turn that triangle into a square by "splitting" the selected vertex? Something like an extrusion that will follow the edge.
I know I can make something similar with the hotkey V to separate the vertex but i still have to fill the gaps:
I also know that I can simply use the knife tool to add an edge and then remove the edge between the two triangles to have a quad.
The final result I want to achieve:
It is simply that I wonder if there is a way to slide a vertex with some of its edges (not all) or if it is not possible.