Click on your name in the top right corner.
Click on Account Settings.
In the Profile menu.
Click on Tags item.
Click on the Menu Icon next to a Custom Tag.
A menu will open.
Click on the Edit item.
A new window will open.
You can change the Tag, Alias, Include in Shortcuts, and Days after Tagged to Expire.
Once you made your changes.
Click the SAVE button in the bottom right corner.
Important: If you give your Tag an Alias. Your Tag will only be displayed under that Alias. If your Tag does not have an Alias. It will be displayed under the Tag name.