Combine Slider with up and down buttons


I have been looking for a better solution to control the volume of my sound system.
Currently I have added two items on the sitemap, for volume control.
One with a slider and one as setpoint for Volume up and down.

I would like to have a plus and a minus button and in between a slider, is this possible?


In a widget you can do Custom widget: Slider with presets
in a sitemap not.