Fiddled with the collar of his shirt as he spoke.
Fiddled with the broken toaster.
A reporter who fiddled with the facts.
Fiddled the figures in the report.
An example of a fiddle is what the cat plays in the nursery rhyme "Hey Diddle Diddle."
An example of to fiddle is to play the violin in a concert.
An example of to fiddle is to pick up and look at each piece of jewelry in your jewelry box.
That parameter setting is just a fiddle to make the lighting look right.