pans delay should really be panning delay, and in accordance with Microsoft terminology for operating systems I would translate it as "Abbiegeverzögerung im Übersichtsfenster";
"scrub expression" is an unusual term, but I suspect from the context that it means a temporarily jotted down value which is saved until the adjustments to the I/O-port have been made, i.e. "diese Option speichert den vorläufigen Zielspalten-Speicherwert";