I have a very specific question for you, Dave, so I hope that's not a problem? I did a bunch of shopping online and really wanted to keep keep copies of the receipts, but many Web sites have a "Print" button for printing receipts. What I want instead is a copy on my computer, ideally in PDF form, so I can avoid anyone else seeing what's on the printer (and blowing the surprise). Even better, can the PDF files be password protected and secure?? I have a big iMac if that makes a difference.

I use paperless billing to save on mailing costs, but would really like to have copies of my bills directly on my computer. My concern is that it's a lot of confidential data if I were to ever lose my laptop. Is there a way to save those PDF reports in a way that requires a password to read them?

I have a protected [secured] PDF document that my lawyer sent me and I want to save it on my iMac but I want to change the password from what she thought would be memorable to something I know I'll remember in six months. How can I easily do that?

We have been pitching a large corporate client on our marketing services for a while now, and and after putting a ton of time into a killer Powerpoint deck, they suddenly want to disseminate it to their staff before signing our contract. I'm not too sure about this, and am thinking that instead of just sending them the preso we could send them a secure PDF, ideally one that would prohibit them copying any data out or printing the content. Is that doable, and if so, how do we get our iMac to do it?