"double-click to edit" is the current tooltip for the description shown on the main UI. If this could also include the preset's description in full, as well as its note, the tooltip would be a bit more useful. Being able to add a note directly from the main UI would be nice too (maybe a Note icon button alongside Desc?). Currently, descriptions are used by some presets to describe the patch's character, whilst others how to use it. The purpose of a note is unclear and buried in the preset browser.
Edit: Ctrl+Enter to add new lines would be nice for notes.
2.0.16