I have found that hand written notes will be transformed into corresponding shapes by preview's shape detection. This seems handy. However, when those shapes are opened in other pdf applications, they behaves different.
Similar behaviour will happen when it has been edited by Adobe Acrobat.
Why does this happens?
- Since PDF = Portable Document Format (PDF)
- = a file format used to present documents in a manner independent of application software, hardware, and operating systems. (wikipedia)
why should the annotations behave so differently?
Can we fix/avoid it?
Preview Version 10.0 (High Sierra)