Duplicating a block you’ve already set how you want it
Select the whole block, including all its elements (its outermost border) and click the
Selecting the whole block
If it’s hard to make out the outline of a block, select an element - image, text box within it - and click the arrow until you get the selection you’re looking for. This button selects the next element up in the hierarchy.
Moving a block
Select the block and click the four-pointed arrow. Now drag and drop the block where you want it. Note that if it’s been part of a 3-column, for example, if you drop it outside, it will take up the whole line and width.