This command is found on the Home tab as well as the View tab of the ribbon bar. When WinList is configured to use the classic toolbar and menu interface, the command is found in the Window menu.
Select Tile to fit all data sources in a grid format. Histograms contained in the data sources are automatically rearranged in a tiled format.
You can click the down-arrow on the button to select Scale to Fit for histogram windows in the current data source.