Making Overlay/Hiding Datasets

Hello-

I'm fairly new at Mappoint, hoping some one might have a suggestion to this.

I want to be able to hide my pushpins according to what dataset I'm referring to. For Example:

I have two datasets, one of Current clients, and one for potential clients, I want to be able to look at the Current clients dataset first, then the potential and then over them both so show the density of the area, I can't seem to find anywhere to do this, does anyone have a solution for this?

Thanks.