Best in bags - remove OS

How do I optimize gear without having my Offspec being factored in? I am tank and do not want DPS pieces being considered.

In the spec priority in “step 1” of best in bags, make sure your tank spec is above the others (drag and drop to reorder them). Then it will get top priority, and all your gear will be gemmed/enchanted for your tank spec with no compromises for other specs.

If it then picks a piece of gear for your tank spec that is also good for DPS, that is just a coincidence. It also thinks it is your best choice for tanking.

Thank you for your response, it is much appreciated.