Dials are typically used on either dashboard pages or home pages to present some quick info about list data in the site or across multiple sites. This works well in conjunction with Tiles, NITRO Reports, and List Views for a snapshot of the underlying list data. Dials give you a way to compare and contrast numbers from different list views. The example dial below is comparing three list views from the "Problems" list; Overdue, Active, and Resolved:
Either edit an existing dial or click on New Dial...
...which brings you to this page:
Dial Name: You can refer to this dial name when adding the dial to a workspace page.
Delay Load: Allows for delaying the load of the web part to speed up the overall loading of the workspace page where this dial is added.
Enable Automatic Refresh: Will refresh the data of the dial periodically.
Configured Segments: Shows currently configured segments with the corresponding list and corresponding view associated with each segment. You can edit or delete segments under the "Actions" column.
New/Edit Segment
Segment Name: Required. This will be the name shown on the dial for this segment.
Site: Required. You can pull data from a list within the current Site, Site Collection, or Tenant/Web Application.
Select Site from Current Site Collection: Shows a dropdown of all sites, including the root site, within the current Site collection
Specify Site Url: Allows you to add your own URL to access a site in another Site Collection within the Tenant/Web Application. Note: the current logged in user will need at least read permissions on the selected site to set up this dial.
Select List: Required. Shows all Lists within the selected site. This will be the list used for the segment.
Select View: Required. Shows all views for the selected list. This will be the view used to filter the data, and the segment will return the count of all items in that view. For example, if you want your segment to show all overdue tasks, make sure you have a view already created that will show all overdue tasks (e.g. with the filter of Due Date is less than [Today]).
Color: This will be the color shown for the segment on the dial, in RGBA. The default value is rgba(255, 170, 128, 1), but when creating additional segments, make sure you choose colors that will give some contrast as to highlight each segment.
Dial Properties
Header Properties
Header Text: The text that will display on the dial (e.g. the example dial at the top of this page has "Problems" as the header text)
Text Align: Aligns the header text to the left, center, or right on the dial.
Cell Header Height (px): Size of the cell that contains the header. Default is 50.
Header Text Font Size (pt): Size of the font in the header. Default is 20.
Chart Properties
Chart Height (px): Height of the dial as it appears on the web part page, in pixels. Default is 200.
Chart Width (px): Width of the dial as it appears on the web part page, in pixels. Default is 400.
Border Properties
Border Style: Sets the border of the dial to be Solid or Dashed. Default is Solid.
Border Color: Sets the color of the border around the dial. Default value is gray: rgba(221, 221, 221, 1)
Border Bottom Width (px): Sets the pixel size of the bottom border of the dial. Default is 1.
Border Right Width (px): Sets the pixel size of the right border of the dial. Default is 1.
Border Top Width (px): Sets the pixel size of the top border of the dial. Default is 1.
Border Left Width (px): Sets the pixel size of the left border of the dial. Default is 1.
When done configuring the dial, you can add it to either a Classic UI page (SharePoint 2013 and above, and some M365 customers) or to a Modern UI Page (M365).