To edt a reference in Mendeley Desktop or Web:
1. Click on the reference you want to edit
2. Use the right-hand panel to select the field you want to edit and click into it to make your changes
3. Your changes will be saved automatically in the Desktop version. If working online, click 'Save'.
Tip: Make sure that the correct record 'Type' is selected at the top of the right-hand panel. The type chosen determines the fields that are available to fill in, and will affect the way the reference is displayed.