It will be nice if there is an option to mark a read thread as [B]Unread under Thread Tools of each Threads like which we see in email service providers.

Because some threads needs more time to solve but some of them are like a minute time to fix the issue.

When I see a reply from the OP I just read the post and try to give replies to the maximum questions (which consumes smaller amount of time) which I can solve it within my limited online time.

When I find more time then I think to go for the followup posts in which I already involved/liked to learn from the interested threads for giving the solution/learn from it in that case I have to search those threads which is very time consuming.

So if we have an option Mark as Unread then it should get added to my manual unread threads area and when I click the View Unread Threads Button in my usercp then it should show the threads which I have manually marked as Unread.