how to use shapekeys, while the model is in a certain pose.

I might do something wrong, but everytime, i want to adjust a shapekey to adjust a model, the model flips back to unposed state. i like to adjust the model while it doesnt flip back to the ‘start pose’, should stay in current pose, while i edit the shapekey.

How should i do that, must be overlooking something i think.

Armature modifier: Click the ‘Adjust edit cage to modifier result’ button (the forth button in the header). This way the model should stay in the posed mode while in edit mode.

Preciser: Buttons two and three need to be active either…