Give permissions to specific branches

Anyone that has view permissions on the main file can view the branch file and vice versa. We have clients that would like to view what we’ve created, but we don’t want them to see us while we’re actively working through them. We thought branches would be a good way to share our weekly progress with them, but we found that if the clients were figma savy enough they would know that they can open the branch file or main file without being invited to both (they just need to be invited to one of them).

So, It would be nice if we can keep the view permissions confined to just the main or a branch file.