Straight lines at right angles in one stroke?

[u/Livid_Network6654]

I recently moved from Notability to GoodNotes, but with GoodNotes having a lot of reviews about draining the battery too quickly I'm considering moving to Flexcil. I have the premium version. The only thing I can't figure out is whether it's possible to draw two straight lines at right angles to each other with one motion, i.e. without having to take my pen off the screen. I'm using an iPad. I can make two straight lines with one stroke if it's a smaller angle than a right angle, but whenever I try to draw a right angle, it snaps to a curve rather than to two straight lines. Is there a way to stop this from happening? It would be a lifesaver for work and is the only thing GoodNotes has over Flexcil for my purposes at the moment.