Only Booxtor knows...
Or you have to experiment with security settings in some pdf creator to find out which one matters. Or combination of which settings matters... Create pdf with certain security settings and try it in M92. And so on with different settings...
Or you may look at security settings of protected files that are not causing problems (and compare it with settings in file discussed) and narrow down possible troublesome candidates in settings.
I suppose the teacher would happily change the settings, if not any other reason, avoiding to force students to use the backdoor to the text... But I wouldn't tell him, there is such a backdoor. Next time he might create a file without permision to print. :-(
Last edited by Mono; 12-03-2012 at 12:27 PM.
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