For the reports, you can edit the details of an attribute, when required. Click on Reports link available in the left sidebar. The sub-links appear as below.
Click on Attributes link. The list of all attributes appears.
Locate the target attribute.
In Action column, click on Edit button.
The Edit Attribute section appears, as below.
You can make the required changes. If you change the Attribute Type, the options for the selected value change accordingly. (Please see Add New Attribute for an example of how to set different attribute types for attributes.)
Click on Save button to save the changes.