"Like most teams, we use Dropbox to share files and collaborate on projects. If a designer wants to change the font size of a file, they simply make the change, press save, and the rest of the team can use the updated file."
You guys are really working inside a shared Dropbox folder?
We have a shared product design folder that houses all our design files. Only the designers have editing capabilities, everyone else in the company has view-only access. It has worked really well for our team.
What do you use instead of dropbox?
We also use Dropbox for file sharing across office locations, but we encourage our designers to always make local copies before working on the files. Then we save these the old-school way with new revision number and initials, like »XYZ Splash Screen 4a CB« and put them back into Dropbox. I know this creates a lot of overhead, but it seems to me a safer bet than having one (or, much worse: several) people working on a file within the Dropbox folder.
I wish there was a proper version control for designs around – we actually experimented with Git for design files, but committing a large Sketch files a few times creates such a big filesize overhead that it was a showstopper for us.