more avatar space for groups

hey i lettin peeps subscribe on my forum but how can i make it so they get more avatar and signiture space?

You can change the maximum avatar size from admin panel=>Styles=>Avatars=>Personal gallery. However it can't be bigger then 150X200 pixels. If you want a bigger avatar, Host it on an image hosting site and then add the direct link for it in your Profile=>Avatar tab(from your nav bar).
The maximum number of characters for signatures is 500 and it can't be changed.

thank you

You're welcome