I have a course where students can do projects by themselves or with one or two other people. I would like to be able to prevent a second student from joining the self-sign up group when a student wishes to work by themselves. Currently, I manually rename the group to add " - a single person group". It does not seem possible to set this group's size to 1 via the GUI - it limits the range of choices to the range [2 ..maximum size for the group set].

Is it possible to set the number of students in a specific group to 1?