If you won't need PC0 all the time leave it in the Storage drawer. From there drag it onto workbench, highlight it and in the Icon menu select "leave out".
That'll leave it on the wb for whenever you need to use it, just double click it. If you're not going to use it again, highlight it and in the Icon menu again, click "Put Away" and it'll magically disappear into the Storage drawer again :-D
