You can but you can only do this using a hotspot.. Buttons are not pano specific which has been an issue raised by others..
For this to work you will need to add 20 + Galleries, naming each one accordingly.. The process of adding images into the Gallery is not the best, it is hoped it will improve.. Each images needs to be added individually.
My advice would be to Group each School into names..
Not sure.. I received the test you sent... If the lost one went into junk that gets auto emptied when I close email.. I receive so many emails, unfortunately heaps of spam too... If it had a title it should have come through.... However, some emails are interpreted as spam even with a title..