Are you using Google Chrome as your browser? There's a known problem with Chrome that reduces the size of the editor panel. This plugin will fix it:
Alternatively, you can upgrade to Confluence 5.1.3 or later. The bug report has the details:
I hope this helps!
Badges are a great way to show off community activity, whether you’re a newbie or a Champion.Learn more
Hi Community, Jessica here from the Confluence Product Marketing team! July’s community challenge is all about sharing pictures — and as an extension of our first post on what ...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs