Change thumbnail panel

hi. i have a questions. previously in skin version 1.3, i could change the size of my pictures in big icons view in myvideos screen if i edited the "thumbnail panel" in myvideo.xml. but now with skin 2.0 i don't know which part of xml i need to edit for do a bigger icon!!. i want to do a bigger icon view!.
thanks a lot and sorry for my english

the same file.

in pm3 the sizes are most probably defined in references.xml, but if you copy those across into myvideos.xml and change them there then it won't affect the rest of the views.