Your line chart shows monthly revenue, and someone asks to see it weekly, or daily, or rolled up to quarters. The clean way to do this in Power BI is a field parameter that swaps the axis column on the fly — one chart, four views, and your existing measures keep working untouched. But wiring it up by hand is the kind of job that eats an afternoon: you need new calendar columns for each grain, a hidden column to keep each one sorted in calendar order, the field parameter itself, a slicer styled to match the page, and the chart pointed at it correctly. Miss one piece and the axis sorts alphabetically or the slicer does nothing.

This skill builds the whole thing in one pass. Point it at your chart, answer two quick questions, and you get a working granularity slicer — run it with /time-granularity-slicer.