When you read our critical edition on the screen all the corrected passages are highlighted and with a click of the mouse, readers can see the uncorrected passages with the print version.

For discontinuous selections make a selection with the mouse, press Ctrl (Cmd on Mac) and make additional selections to copy or print just what you want.may.

To our second example program just before the call to MainLoop, the program will print out the canvas coordinates to the console whenever we click the left mouse button over the canvas window.