password protecting powerpoint
Hi
According to the built-in help
Open the presentation you want to create a password for.
On the Tools menu, click Options, and then click the Security tab.
Do one of the following:
To require a password to open a presentation, in the Password to open box, type a password, and then click OK.
To require a password to modify a presentation, in the Password to modify box, type a password, and then click OK.
Note Setting a modify password allows others who do not know the password to view the presentation, but prevents them from making any changes to the presentation.
In the Confirm Password dialog box, type the password again, and then click OK.
HTH
John