Sometimes when you create a timetable you use a lot of constraints that come from the requirements of final users, but a year later when you have to repeat the job, you tend to forget why you added certain constraint that doesn't make sense at a quick glance.
If you add a comment field to be able to write down something about the constraint, it would be really useful.
Are you using the latest version? (as of now, FET-6.19.5.)
But I think you didn't find the feature. Since a long time now FET allows comments for all the items, including time/space constraints. You just need to go to All time/space constraints dialogs and press the Comments button.
Unfortunately, adding/modifying comments are only accessible from these dialogs (the comments are though visible in the constraints' description everywhere). There is too little space to add this button and maybe other buttons in each constraint's dialogs. Also, it would be a long and tedious work. But I could try to do this, if some organization(s) would offer a sponsorship contract.
Thank you so much!
I have been using this software wrong before.
Oh... I am sorry!