This is my first ever Blender Stack exchange post. I am trying to use fSpy to recreate an interior. However, whenever I extrude the plane which I'm to align with the floor, it seems that extra loop cuts are made for every extrusion. I've tried extruding in vertex, edge, and face mode but this problem is still persisting. I've also tried selecting the extra loop cuts individual and deleting the edges. However, when I do this it ends up deleting some of the plane. I am trying to extrude the plane in such a way that no extra loop cuts will be made. Any tips would be much appreciated.
If you want to extend your plane without adding any extra edge loops it can be done by either moving it on the desired axis by pressing 'G' and then pressing the desired axis (eg. 'GX') or scaling the mesh by pressing 'S' and then pressing the desired axis. (eg. 'SX').