Converting subroutine to chart

A question about subroutines. Is it possible to convert a subroutine back into a normal chart? I would like to do some experimentation with altering and possibly repurposing a subroutine and it seems it would be much easier to do if it were a normal chart.

Usually I go the other way (make a chart into a sub) but whichever direction, you can just copy/paste; e.g. use your mouse to lasso the blocks you want, Ctrl+C, then go to your new chart, Ctrl+V.

Just make sure you have matching versions. Also, if you happen to have tag names that are common between the two you could get in a bit of trouble, but other than that, super easy.