I click on the signature button in the Preview.app toolbar:
The following box pops up:
I click on the Click Here To Begin button. The box is now ready for input:
However, I cannot get any markings at all to show up as my signature. My box always looks like the above image.
I've tried doing the above in an image document and a PDF document. I've tried holding down the trackpad while writing and not holding the trackpad down while writing. I've tried using a mouse.
Is there a fix for this bug, so that I can use my Macbook trackpad to write my signature?
Note: the Camera-based signature method technically works on my machine. However, its rendition ability isn't great.
OS X El Capitan, version 10.11.6.