I have over 30,000 emails in my inbox. I want to erase most of them but not all of them. How can I delete just single screen pages of emails and not all of them?
There's a number of ways to approach deleting large numbers of messages, but for one screen check the small box at the top of the list to select them all and then hit the trashcan icon in the toolbar. Depending on how many you want to keep, you might consider moving them to a temporary folder you create, then go back into the Inbox and use the "Delete all messages" option by right-clicking on it.