Click on the drop down box with your login name, next to the pipeline.
select "Set Permission" from the drop down menu.
you will see a table of everyone who has access to your Rave Build system. Click the blue "Edit" button of the person you wish to edit the permission for.
You will see and edit the details of the person you selected. To view and/or change the permission that person has, select the drop down box under "Permission".
Tick the boxes that you want the person to have access too if you leave the boxes unticked they will not be able to see/manipulate that item.
Save your changes, click the blue "Update" button. Your changes will be updated!