gmail is:unread

Gmail is really fancy and high productivity. Though still need some mental labor to discover features.

I want to mark all my unread messages to be read, though difficult to select.

Use the advance search feature, from the drop down of the search criteria, select “unread messages”, the result will show you the search keywords as “is:unread”.

So just go to the label you want to check all unread, in the input bar, append “is:unread”, it will display all the unread messages for that label.