In preview mode, only layer numbers are shown whereas the "... printing at height" on the advanced tab are specified in mm.
This means that when I look at the preview and decide that I want to use a different process starting at a certain layer, I have to calculate the height by hand.
Yes - these options must be in mm and not in layer number since this is the only way to allow me to loada new program to start at a certain height when printing was interrupted.