Mach Trim
On G/A:
Call for/selection of 1 stage less flap (so Flap Full->Flap 3 or for Flap 3->2 or from Flap2->Flap 1 - bear in mind that the G/A can be initiated before final flap setting is achieved).
At that Flap setting you climb to Aa before accelerating to desired speed. You should only make further flap changes after Aa.