How to show more than 8 Latest Products?

HI..

I have a problem about Latest Products..

For example:

there is eight Products in demo..http://demo.opencart.com/

but i want show more Products in Latest Products...

For example:

http://www.thesexespot.com/opencart/

look at the index...

there is twelve in Latest Products..

tell me ..how can i do it...

thanks..

i am very soory for my poor english~~