I have a question about how enchanting works with a masterworked stat

Ok So I have a neck thats max rank 12 and w/ 3 to cut to the bone +1 more point from masterworking so its +4. I want to get heavy handed on it it. My question is that when I am rolling it in the enchater window and I see my roll results… am I looking for +2 and then once I select it the masterworking kicks in and its boosted to 4 after? Or when I’m rolling should I be looking for +4 as a result? I just dont want to select the wrong one.

Unless you’re rolling a GA enchant where +3 is possible; +2 is what you’re after.