how do you disable item skill bonuses in grim tools?

[Gasp]

getting sick of trying to figure out how much they invest into skills before items by adding/subtracting on every singel build there's gotta be a button for this somewhere I can't find it

[ZarahNeander]

press shift+ctrl

[Gasp]

tyvm!

[powbam]

GrimTools has its own forum thread that details everything you can do in the calc, shortcuts and all. I suggest a read when you get a moment.
[GrimTools] Build Calculator[www.grimdawn.com]

He has a short FAQ almost at the very start of the post that actually details what you were looking for.