Neocities.org

Hi everyone I was wondering if anyone could help me with this one page I have? https://bigfishlittlefish.neocities.org/onorasclan.html so I have this imagemap with the ability to show text upon hover in the form at the corner (only Grey has text for now), but I would like to make the form be a larger box so I could add more text to it...I couldn't find something simple for this on google.