[asheshouse]

Thanks ClockWatcher. I'll try that. I prefer to work in FMB so you can see the visual effect of the changes. Using the function you describe will speed things up a lot.
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Tried it now and it works fine. Much faster progress.
You can actually select heights within the Object/Height/Fill function.
Once you have "pasted" a height level if you then adjust it with the mouse wheel the new height level is memorised.