I think the categories label needs more improvements for the next version, especially for the e-mail. There isn’t nothing about it at the reading pane and no highlight at the e-mail message, only a small box that shows de categories and you can change it too.
in the upcoming version 7 it will be possible to, for example, use the category color to be the text color of the email in the message list.
I am not sure from your post what other improvements you’d like to see to the way we treat categories. Can you elaborate?
This is also good, or a category label/marking at the reading panel, something to call attention, and the e-mail window needs something better, like the MS Outlook (there is a long label at the top of the message view).
And taking advantage of this contact, I think the text format needs some improvements too, like the text background color (a yellow marker), this is a very important stuff.
changing backgroud color/highlight is also a new addition in version 7
Great! When comes the version 7?