Everything is in the title!
The idea is to make a pdf that I send to clients by email, very graphic with colored backgrounds but when printed, the background becomes white to save ink. Similarly to the change of color of the text.
For example, on the screen when I open a pdf I see white text on a blue background but the impression we see black text on white background.
Convert the background to a button and set it to appear on screen but be non-printing.
With a little delay & my apologies, anyway, after a little test, your solution works very well. thx!!
A more flexible solution was given to me on the French forum by Mr. JR Boulay
"We need to generate 2 PDF, one with color and one in black and white. Open the PDF with Acrobat b & w and in the layers palette ask "Import as Layer" color PDF.
Who will come on top. In the Layer Properties it only remains to define the PDF / color layer as "not printable."
It will just be careful that the color PDF has no white background because in PDF it means transparency and thus we see through ...
(Just use black backgrounds at 1% to fix this problem). "