Minecraft Superflat preset saving & creating java

When I make a custom superflat preset I want to be able to save that preset, to be used later instead of making it every single time.

Can you also make it easier to make a preset, I don't want to right down the block I want every time I want to make a custom preset. You could make it where you can open a list of every single block in Minecraft then click on a block and then it will get added to the layers, Also add arrows to move the layers up and down.

Please Consider My Proposal.