Mark as read in gmail

Question

I'd like to know how I can mark all messages with a certain tag as read, all at once.

I have around 2000 unread messages with a certain tag, and I don't want to go through endless pages of "select all" -> "mark as read"

Thanks

Answer 1

There are two ways:

1. Perform a search to find all the messages you want to select. (You can use is:unread too)
2. Click select all
3. You will see that above the first item in the list there is a banner that says something like: All 50 conversations on this page are selected. Select all # conversations in "..."; click that link.

You can also do this with a filter, by creating the filter, choosing to mark the messages as read, and then choosing to apply the filter to the matching conversations. Then simply delete the filter.

Answer 2

Click 'All' next to select. It selects first page of messages Click 'All N messages' after new prompt is shown and confirm Click 'Mark as read'