Notice my google search words at:
That PDF seems to find a downloadable manual at http://ftp.casio.co.jp/pub/world_manual/qv/en/EXZ300_e.pdf
I notice you giving two model numbers so I'll just see if you will correct that post by a followup.
Imagine. I purchased a Casio camera, model EX-Z300 over 3 weeks ago and it came with no users manual ! Is this commonplace now, no manual but a CD-ROM which includes the manual? Suppose you have no PC or no printer? Then you get no instructions. I contacted Casio and was told to send a $7 money order for a printed manual. I have yet to receive it. In the meanwhile, the camera is being operated with no instructions and it has malfunctioned several times and now cannot be exchanged.