Portfolio grid layout

Hi,

I have two questions about the portfolio page (portfolio grid layout). I am using 3 column layout.

1. Is there any way to increase the spacing between rows? I am using 300 px X 300 px images and the rows look crowded.

2. Can we add a caption + description for each image below rather than hover and display? And change the hover color from grey to something else?

Thank you so much