Add an item to a checkbox in a content type I started working with drupal recently and I have been assigned many small tasks. I would like to know how I can add an item to the following checkbox, I can't understand how:

Thanks in advance!
Click on "field settings" in the top right hand corner of that screen. That's where storage specific options are held.

If you can edit the options there then it's a simple text list. But it may be that field is referencing a taxonomy term or content/entity but that tab will lead you in the right direction to add an item