The default color for annotating PDFs in Document Viewer is pale yellow. How to change this default color?
2 Answers
There is no way at this time to change the default colour, you can however change the colour of a single existing annotation by right it clicking and selecting "annotation properties".
If you'd like more options you can try the okular pdf reader which has a more powerful annotation system.
Right click on the highlighted text/object, you should get a new window with several options one of them is Annotation Properties...
Select it and you can change the color of your highlighted text.
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3Not as such a correct answer. This changes the color after the note has been created. It does not change the default color for a new note.– vanadiumJan 30, 2019 at 14:45