Creating a multi filter (basic question)


I think this is simple but can’t find info on it anywhere.

I have a dataframe and want to show line plots.

One column has, for example, the year, another has the month.
I want to be able to display any combination of those. eg all lines for one particular year, or just lines for March but in every year.

I’d like to use checkboxes or similar.

Surely this must be simple?!