There are times when you need to work with data from two different programs. To see more than one open program at a time, you can right-click on an empty space on the Taskbar and select 'Tile Windows Horizontally' or 'Tile Windows Vertically'. This is fine if the only programs open are the two that you're interested in, but it's less useful when you have a dozen apps running. To tile just a subset of your open programs, click on the Taskbar button for the first program you want to tile, then click on all the other program buttons while holding down the 'Ctrl' key. All of the Taskbar buttons should remain selected. Right-click on any of the Taskbar buttons and select 'Tile Windows Horizontally' or 'Tile Windows Vertically'.