Hi Yves, the no registration mode is to be set in
4) Register, registration mode: no registration.
APP is unlike PI, it is setup to do all steps
2) to 6) all in one go. So Registration is always a logical part of a stack process. If you have registered the data already, you want to use no registration mode.
My logic: if you don’t implement it like this, you’ll need to save your frames always after registration. Before starting a stack proces. I actually never save registrered frames as part of a normal stack routine.