Working on a filter for desktop, and need to decide which kind of filter handle giveS the user the obvious impression that they can use it as a slider.
Any other suggestions besides the above are welcome as well.
Combine 1+2 with a little bit of seasoning.
Option 2 is great because the selected range is thicker and a bit darker. But the black handles don't provide any affordance. So I would replace them with circular handles from Option 1, but why not throw in a bit of drop shadow for that extra-affordance?
Without knowing much of the context or output, I'd say four initial things:
And then test!