The Desktop plugin launches windows, and the windows are responsible for sizing the loaded content within.
Can you explain this further i.e. using say a screenshot to highlight the current problem?
Note: the more information you provide when you first raise/ask a question will mean you will get a speedier resolution (pictures speak 1000 words as they say) a good image annotater that is free and easy to use is Skitch https://evernote.com/skitch/?noredirect