Yes — you can add or edit tags directly from a piece of content within the Library.
Open the Library in Data Grid View.
Locate the Tags column.
Click into the tags field to add, edit, or remove tags.
If you type a tag that doesn’t exist, you’ll see an Add Tag option.
Selecting this will automatically create a new tag.
New tags created this way will appear in the Tag Manager under Uncategorized, so you can organize them later.