"But how do I create a schematic block from this" The EasyEDA design flow is to start with a schematic and create a PCB from that. If you start from a PCB you have created directly without a schematic then you have no option but to create a schematic from scratch that matches it. The idea of the module is that you save it and then you can place it like any other symbol into a schematic or footprint into a PCB. If it is a PCB module and it has a board outline then you should delete the outline after you have placed it into a PCB. To create a board outline, you can use: **Tools > Set Board Outline...** 

Ok thanks - will give it a go.  Too used to how things were with my previous tool which my dongle eventually stopped working for many years after I stopped paying maintainence on it :-)

BTW, what you are describing is usually called a macro.  I think EasyEDA might want to consider changing the menu name.