checkbox for tasks in the tree
 

Maybe I'm old-fashioned, but having a checkbox in the tree for tasks, would help.

I have checked and it seems to be possible with the tree control used.

I know I could assign different icons but it's far from comfortable.

Moreover, with checkbox, other things could be doable, like a strike-out font or shaded font color for completed task.

Check 'Tools | Options | Trees | Show item flag icon in tree' and restart UR. Then to change an item's flag, click on the item's flag icon (or dot, to the left of the item icon) in the tree, and select a flag value in the popup menu (or use Shift+R, Shift+G, etc.). The flag icon changes to match (as well as the text color [as long as 'Tools | Options | Grids | Use flag colors for item text color' is also checked]).

You can also right-click -> Flag -> color or tear off the Flag drop-down menu (drag the top header of above None) as a toolbar and place it near the tree.

Thank you. I'm ashamed, noticed this previously when I was running the trial few weeks back, but completely forgot about it now that I returned back to UR.

It's not as ideal as the checkbox, but works.