Tootfinder

A lot of the analytical work I do really adapts well to #Jupyter Notebooks. It's very helpful to organize the code into logical chunks, one chunk per cell.
However, now I want to re-run the entire workbook, changing only one parameter.
Is there an easy way to do that without merging all the cells together?
ETA: My notebook has a parameter section at the top, but now I want to …