I have just installed Ubuntu 12.4 LTS as an absolute beginner migrating from Win7, I notice that, windows, icons and everything is so big. My screen resolution is 1366*768. Is there a chance to make windows smaller. For example on Thunderbird, I can see 10 lines of mails while on outlook of Win7 with the same resolution, it was 30. I mean here, the window is not compact and fonts are so big etc. Should I switch to a different desktop envirenment?
I am sorry that this is a very basic question and any suggestion is kindly appreciated.