How do I move a course into another course?

To amplify what Karl has said about block templates, these give you a very powerful way of moving content.

We often reposition elements of a unit by creating a new block template and selecting those items we want to reposition, saving the block with the name, 'copy' then finding the insertion point in the unit, opening up the block templates choosing the block called 'copy' (it will show at the top of the block list) then opening it at the insertion point. Then we delete the block called, 'copy' in the templates list. Sounds long winded but, takes only a couple of minutes.

We've also created some blocks with the formatting we want, background colour, font size and a sample of text to give us the equivalent of 'Styles' that you meet on the ribbon in MS Word. That way when there is a new heading needed, we grab the style block from the blocks list and pop that in place then enter, for example, text into the block. Again, once you have your style blocks you are away.

What I'd love is for the block template list to be open as a side window so that I could select as I go rather than having to open the block template list then select what I need.

Good luck.