In the free Acrobat Reader, changing the properties of a group of markup is a snap. Actually, this works in the Pro too, and probably in versions as old as X. Find out the steps today, in my How To column at Copyediting.com.
For more on PDF markup, check out my on-demand course, prerecorded for Copyediting.com.
Photo by monsterkoi/pixabay used under CC0 license.