I’m happy to hear that this could help you, and I think there is indeed a better solution for this. Took me a little while to verify out because I don’t use class diagrams very often in my projects…
If you add comments to your attributes and operations then those will also be displayed in the description window (you can use control-shift-u to open this window, or click on the indicator in the lower right corner of the screen). This is a much better way to comment / describe these class entries because if you ever re-use your class in another diagram then these comments will also be used whereas a note has no direct association with your class, so you’d never see that appear somewhere else.
This is what I mean:
It may be a little more difficult to notice at first (especially if you don’t have the description window open) but it’ll be a lot more portable than a note.
Easiest way to set this up is to select an attribute or operation and then open its specification (press enter). In the ‘General’ tab you’ll find the option to enter a description.
These can also be specified when you add attributes or operations to a class.
Maybe food for thought?
Yes, create a new topic and then be sure to select the “Feature Suggestions” category (the drop down menu is right behind the topic title).
(edit): Sorry, I didn’t notice before but you already posted within this category, so I’m pretty sure the developers will have seen this.