Can I revert to compact view in V8

Hi all. I recently upgraded to V8 free version. I like most of the new features, but is there a way to revert to the compact view of V7? I have the Mail column on the left, the message column on the right with the message box on the bottom, the way I like it, but the Mail column and Messages where it shows sender, subject etc are on double spacing where they used to be single, and the whole appearance is just too ‘spaced out’.

Can anyone assist?

Regards Gaynor