Alenka Prezelj thank you that information on copying whole pages from one course to another is very helpful . Was thinking more along the lines of copying elements/blocks from one page to another,  within or across courses. So for example:
Scenario 1: 
Course A: Page 1 - someone suggests an alternative idea for a learning activity  that is already built in Course A: Page 1...As a design team we  are not yet sure if the alternative is better  or we need to show how the alternative might work/ sit within the context of learning before we commit to it and change what already in course A: Page 1....so we might build a prototype of alternative activity in our Sandbox... so Course B: Page 1  for design brainstorm/meeting/discussion-and if SME and learning design team, then decide yes this alternative activity is better re: scaffold/alignment with learning outcomes etc . ...we then  want to be able to then  copy that now refined element/ block from our Sandpit - Course B: Page 1 to Course A: Page 1... so not the whole page just a block/element. 

And 
Scenario 2: There is a block/element in Course A : Page 1 that really should be on Page 4 instead- how can we easily move the block/element without recreating it on Page 4?

Any tips? 

Cheers

Lenni