The Export Canvas dialog will pop up if you click the Export Canvas button on the clipboard window. When you type a file name, choose a directory and click the Save button, a PostScript file representing the canvas will be copied to the directory you have just selected.
Caution : The canvas to be copied is what you see in the window and excludes the area that is scrolled out. You should be sure that the whole part of the canvas you would like to copy is shown in the window before exporting it. If some part is scrolled out, you should make all the images you are going to copy seen in the window by adjusting the magnification or arrangement of the images with the Shrink, Enlarge, Incr Column, or Incr Row button.
It would be better for you to convert the PostScript files to Portable Document Format (PDF) if you are going to print them or attach them to e-mail. The easiest way to convert a PostScript file to a PDF one differs from one operating system to another. For example, on Mac OS 10.5, double-clicking a PostScript file will start the Preview application, which automatically convert the file to a PDF one.