SplViewer, the spool file viewer, allows you to see.
Edit By BS Editor: SplViewer, the spool File Viewer, allows you to see what is going on `inside printer spool file content.

SplViewer can do the following main kinds of things (plus other things in support of these) to help you watch the spool file:

You can view spool file using SplViewer.
Scroll through the spool file in the folder.
Increase or decrease the Image Preview size.
View the spool in full size or as the best fit for your window.
Rotate images right or left by ninety degrees.
The program is written in C. Now it only can run on Microsoft Windows. you can free download SplViewer 0.1 now.