To view tags, click on the Settings icon in the main left vertical menu panel. Within the Settings screen, click on Tags in the secondary menu.
To create a new tag, click on the New Tag button. Add a title and an optional description for the tag. Click Next, and add the new tag to projects. Projects listed will be those for which the logged in user is a project owner.
Click Save to save the new tag.
To edit a tag, click on the vertical three dot menu for the specific tag and click Edit to edit the title, description or project that the tag is added to.