Space between forum catagories (vb4)

[Moey]

Hey guys..its been such a struggle getting a grip with the vb 4 series ..i finally have to give in and ask for some help with what is probably a simple adjustment.

I need to add a bit of space between forum categories as shown below so if someone can show me exactly where the editing would be in vbulletin 4 admincp and if there is any additional code i need for this..it would be much appreciated, thanks in advanced