Please clarify, where do you see this, are you on mobile, the web version, are you adding a task or?
I see this on web version, if I click on the three points at the end of a task, means in the context menu after "Erinnerungen" in the german version.
Can you send a screenshot of it to email@example.com
I'm also wondering what this means...? Is it just to mark a task as done or does this have an additional function?
Technically, this option completes the task just as if you'd click on the check box, but what makes it different from the check box is that it directly forces the task to move to history. This is useful if you have a recurring task and don't want it to recur anymore or a sub-task which you want to remove from the list right-away.
The alternative to this option is the SHIFT key. When you hold SHIFT while checking off a task through the check box, it will also force the task to move to history even if it's a sub-task or a recurring task.
Sorry to bump this old thread. I just stumbled upon this today, and I find it a great feature. But I think the wording (at least in German, I don't know how it is in other languages) is a little confusing. How about changing the title to "Ins Archiv verschieben" or "Archivieren" (as I imagine the wording in English is "archive task" anyway)? I think this would clarify what the action does.
Thank you for the feedback! I'll make sure to pass it to our translation team for consideration. :-)