Changing default file permissions

Is there any way to change the default file permissions? Any file I create is 'Read-only' to anyone but me, which isn't usually a problem in most cases and seems to not be a problem for anyone using the files unless I upload them to Dropbox, then people complain that they can't crop them or print them, but when I go in and change them manually they work fine. I've changed all permissions in my Dropbox folder, but I'd prefer it if this wouldn't continue to be an issue.

 

I have checked it but I can't find anything that seems similar. I'm just trying all angles. When I change the permissions in the folder in OSX, as I would any file, they are immediately accessible to people accessing them via Dropbox, so I thought that fixing it in Finder/OSX would solve the problem just the same.

----------

lol... I found that too Thanks