We routinely common-size the income statement and balance sheet, showing components as percentages of revenue or assets, to give us insight into margin trends, liquidity, leverage, and so forth. I also common-size the cash flow statement, using net income as the basis (100%). This tells me which components are the most sensitive and volatile on a relative basis. It also highlights inconsistencies with historical results that might be due to data entry errors (I make many!) or legitimate assumptions such as a large capital outlay. You only have to set this up once in your template, and it’s all automatic from there.
Incidentally, I show my common-size percentages without decimal points (e.g. 3%). Decimal points imply a degree of accuracy that is just not there in a forecast!