[HGMonaro]

since this is a basic question thought I'd add a basic warning, make sure you export/save to a new file (different name or folder) so you don't overwrite your fullsize image. You might want the fullsize image for another purpose (eg printing)

[k0og]

Another tip...

After resizing your picture to a smaller size, it is good to apply a little sharpening to bring back some detail lost in the size reduction. Don't apply too much sharpening though or it will cause over-sharpening artifacts and make the photo look unnatural.

Take a look at this article for some pointers - I just came across it in a web search. It shows that sharpening (and other important adjustments) are in the "Adjust" window.

Use iPhoto to Make So-So Pictures Super Cool | Macinstruct

-Joe-

[New Englander]

Ok, thanks!