If you want to move a single node then you click on just that node (after selecting the roof).
You can't select multiple nodes and move them at the same time.
However you can select an edge of your roof and move that edge (which sounds like what you want to do).
That will move the edge (and both nodes at each end).
There is also an option in the pet palette to move all edges - this will be available whether you select a single node or an edge.
Just to complicate matters a little more, if you have an eave overhang on your roof then you can select either the edges and nodes of the eaves (which does not affect the shape of the roof but just the shape of that roof plane) or you can select the edges and nodes of the pivot line (which will affect the overall shape of the roof).
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11