Arranging UI for iFrame API

I’m using the iFrame API to do a custom integration that allows us to hold office hours efficiently for a large course. Works great! One problem though:

Sometimes the screenshare ends up pushed all the way to the right, causing the context window that we add on top to obscure the shared content.

Is there any way that we can force the screenshare to align with the left border of the enclosing window, and choose another location for the watermark? (We’re self-hosting but I just haven’t gotten around to removing the watermark.) If not, is the location of the screen sharing view within the enclosing iFrame predictable enough that I can (for example) just move the context window to another location, like top left? (I guess I could also just ribbon it above the Jitsi iFrame and avoid this problem alltogether…)