Our goal for the Understand editor was to provide something equal to the
top programming editors, but also give it lots of features for maintaining
and understanding code. And that's what we've achieved -- the best
programming editor for maintaining code.
The Understand GUI incorporates modern features like tabs, tab groups and docking, to name just a few. The editor has all the features you would expect, such as syntax colorization, auto-completion and syntax-based collapsing & folding.
In the C portion of the editor, when working in C-preprocessing regions, the option is there to hide or show active & inactive regions. This is a huge benefit for users working extensively with the C-preprocessor.