Screen capture in PDF format doesn't work correctly on Mac
MuseScore 2.1, 2.2-dev and 283b8c9369
On MacOS 10.10 and 10.13
* Open a score
* Click the camera icon to enter screen capture mode
* Select an area of the score
* right click -> save as > PDF
The resulting PDF has the right aspect ratio but the music is too small.
Other users reported that it works on Windows.