Preview in OSX El Capitan defaults to 100% scale When printing a jpeg, preview now defaults to 100% scale, which is not what I want. I am having to manually select scale to fit and fill entire paper. How can I make it always default to the latter (as it used to in previous versions of OSX)?
In the Preview Preferences, you can define the 100% scale.  In Preview press Cmd ,, then click on the Images tab.  You will get two options


1 image pixel equals 1 screen pixel
Size on screen equals size on printout




Select the second one.