Hi Rainer and thanks for your question. This feature, called "Make Similar Page," is not currently available (1.3.6 and 1.3.7). It might be available soon, however (1.3.8), since I just noticed how annoying it is to not have this.
In the meantime, please save your page and load it, by double tapping on the page tab in Design Mode.
When you have completed this, there will be overlaps in the channel-cc combinations. Get around this by renumbering the page (same menu). "Unused" will ensure that you get unique CCs that no other control has.