How to modify a tag?

To modify a tag, tap the "Admin" button on the "Today" tab.

Then tap "Tag" to switch from task admin to tag admin mode.

Tap the tap tag to modify that tag.

Users can change the type between "Basic" and "Numeric" as well as switch between "Basic" and "Drop-down." But the user cannot change the tag type between "Numeric" and "Drop-down."

After configuring the tag, tap the "Done" button on the top right to save it.