how to reduce the space between index sub-forums

[Papy75]

Hello
I want to reduce the space that there is between each sub-forum on the index page of the forum.
See the screen
I use vBulletin 5.5.6
thank you so much

https://forum.vbulletin.com/filedata/fetch?id=4434402&d=1581612794

[redragon29]

interested too!