Depending on what font you use and what size you set the font to, extra space can appear at the bottom of the menus. The following steps fix this:
1. Click Page info
2. Click Header
3. Click Javascript
4. Paste the following code into the box:
GLOBAL_extra=40;
GLOBAL_factor=1.2;
5. Change the number 40 and 1.2 to the desired values. This can be quite tricky to get right. Extra is the amount of pixels added to the bottom of every menu. Factor is the amount to increase the estimated size of the menu by.
This will need to be completed on every page.