How do you make the refresh rate slider show?

In mameUI what do you have to do to get it to show in the tab sliders menu, i seen a guy in a video on youtube adjusting the refresh rate with it, i clicked tab and then the slider's option and can't see it.

Thanks

Have you asked the guy in the Youtube video?

Where is the video?

Yes

He doesn't know himself specifically it sounds, he told me to tick everything in the video properties.

Please let us see the link of the video

It appears when you use the -cheat option.