How to personalize showcase ?

Hello,

I would use the showcase module in sidebar position of my template
This position seems not to be enough large for the module

is there a way to personalize the showcase module to avoid this :
http://awesomescreenshot.com/0ea2oobu51

and have :
Title <br>
Image

and no more items numbers button
only the "see more items"

thanks in advance for community help on that
Loïc