Gmail – Can Gmail be configured to display ALL labels on the right pane

You have two choices:

1. label:AJ-Label-1 label:AJ-Label-2
2. label:AJ-Label-1 OR label:AJ-Label-2

The first option will perform an AND search, meaning the email must have both labels applied to it. The second option performs an OR search which will match if any of the labels are applied to a message.

The fact that both start with AJ unfortunately doesn't help since labels can't be searched via stemming. You must list both of them explicitly in your query.

Tip: To make it easier to create queries, you should use the search box in Gmail which provides code completion, and then copy and paste the query into the Multiple Inboxes settings.

Note: If your labels contain spaces, replace the space with the - character.

You can remove it ONLY if you create a new message from it (by replying or forwarding to someone), if you are opening for viewing, it is (I think) impossible.

If you want to remove it when creating a new message, just select it and delete with backspace or del on your keyboard.

Cheers.