Advanced QEdit Features
From Unofficial QEdit Wiki Guide
QEdit offers optional extended functionality on top of its original map placement, scripting, and other features.
Placement Options
Settings related to monster/object placement on the 2D map.
Snap Options
Settings related to automatic alignment of monster and object X/Y/Z values while placing them on both the 2D map and in 3D View.
Notes Panel
A feature of the script text editor which allows you to keep quest-specific notes and assign tooltip names/notes to labels, registers, opcodes, and number values.
Miscellaneous Functionality
Other less documented information related to functionality.