enable pxe on computers boot priority

Hello.

When you want to enable "put an image on this workstation on next boot" in
console one on a computer object. Must pxe be on a higher boot priority
then the disk drive, or is it enough that pxe is just enabled like it says
in admin guide?

If pxe must be higher in boot priority is there any other way to do this
rather than "visit" all workstations

Great regards

Tom