Step 1
Go to Studio and open My Content in the left sidebar menu.
Step 2
Hover over the content you want to edit tags for and click the three dots up the top right and then select 'Edit tags'.
Step 3
A popup will appear that will have a textbox where you can enter a new tag and then click the 'Add tag' button. Any previously saved tags will appear below the textbox.
Step 4
You can remove a tag you've already added by hovering over it and clicking the 'Delete tag' button.