If you were to update your user profile here, then at least information on the hardware/software
in use (if current and available) would be some information for us to use, to offer more precise
replies in hopes of helping you resolve the issue.
Given the iPhoto in the older PowerPC Macs, (not Intel-based, all prior to 2006) would be different
than a later iPhoto in a newer Intel Mac, unless they both happened to run Leopard 10.5.8.
•How to identify iMac models - Apple Support
The newest iPhoto is being replaced with Photos, so the support pages will talk about that; so the
need to know what you really have, be it an old G3/G4 or G5 PowerPC iMac, or some kind of Intel
based iMac from 2006 to 2015, does make a big difference in the kind of reply you may get here.
iPhoto for Mac - support community for iPhoto, as part of iLife, prior to Photos app for 10.10..
There is a fair chance you may not even have a build model of the vintage this discussion area is about.
So without details about the build year model & OS X system installed on that hardware, here we are.😐
Good luck in any event... 🙂