Not sure if this has been posted before, but the following is a useful site if you have lost your Canon user manual

Canon User Manuals

I make it a habit to download the manual for anything I buy these days, in case the manufacturer doesn't continue making manuals available for "obsolete" products. A local copy is usually faster to find than one on the manufacturers web site, or digging through the bookshelf.

Giles

I have downloaded PDF files of manuals of all the equipment I have. I have it on the computer I take with me while photographing nature/landscapes.
If there is a problem with a particular piece of equipment I have the manual to refer to and hopefully find a solution.

I used to pack most of the instruction manuals in the suitcase. Lot of weight, room and bother.

And searching on a computer is usually faster!