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The question I am asking below is based on a very simple minded notion of printing a document. If the notion is wrong, the question may well be ill conceived.

You proceed to print a document (monochrome) on a postscript printer, for example, an Apple Laserwriter printer with Adobe Postscript. Here is the simple minded notion: the printer takes your document and turns it into something equivalent to a grid of black and white squares; then the printer puts a dot of toner on the page everywhere there is a black square.

Here is the question; is there a program which shows you, on the screen, that grid of black and white squares? (So, for example, printing the same document on same computer, the program would be expected to display a different grid using a 300 dpi printer than a 600 dpi printer.)

Any guidance appreciated.

Roger Purves