Slicers are used to filter queries using hierarchy elements from the data model. The Slicer Styles drop-down is used to change the design style of the slicers. The drop-down exposes 3 styling presets from which to choose: Classic, Modern, and Clean. The selected style will be applied to all slicers in the report.
Open the Slicer Styles drop-down from the Design ribbon to access the style presets.
Classic is the default slicer style. It features a border all the way around the slicer selection. It also displays the slicer icon to the left of the title.
When open, the search bar is a solid rectangle with a border all the way around:
The Model slicer style displays a line beneath the current selection. The slicer icon is displayed to the left of the title.
When opened, the search bar has rounded corners and a thin border:
The Clean style displays a vertical line between the title and the slicer selection. The slicer icon is not displayed.
When opened, the search bar is displayed in gray, and had no borders: