I saw your other post, but thanks for sending it again. :o)
So here the answer again:
Hi CarpenterYoon,
In the right upper corner of the interface (Object Manager) you will find an icon that looks like a closed eye (Left sided from the plus), and shows an open eye when clicked once.
You will find there a list with the objects, tags, etc in use. Double click in the Normal Tag to activate all of them at once. Then do what you like with them.