The editor experts sub-menu of the main GExperts IDE menu can show partially offscreen, since there are so many menu items there now. This only happens on low-resolution displays. A user verified this in XE2, XE7, and 10.2. It probably doesn't happen in older IDEs (like D6) where the main menu supported scrolling. See the attachment.
We work around this in the main GExperts menu, but it was not an easy fix and was not built to be applied to the sub-menus, so it would take some work to fix.
Some workarounds for now are or use the shortcuts instead of the menu items to execute an editor expert, switch to a higher resolution screen, or compile GExperts without so many editor experts.
I just implemented a workaround: If the screen is too small, show a popup menu instead of a submenu as in Delphi 6 or 7.