How to do Field-Associated Actions

To edit a custom field, take the following steps:

1. On the left pane, under the Index Configuration section, click Fields.
2. On the Fields page, hover over the corresponding field row in the far right  to see the edit/delete options.
3. Click edit against the field to want to edit. 
4. In the Edit Field dialog box, make the changes required. 
5. Click Save. 
6. Click delete  against the field you want to delete.

Note: System fields (with prefix sys_) cannot be edited or deleted.