One possibility is to not use the adjective: "Select a printer".
Another is to use the adjective appropriate to the action: Sometimes you mean "Select a disk", sometimes (like for formatting) you mean "Select the target disk", sometimes (for installing an OS) "Select the desired boot disk", etc.
I wouldn't look for just one word. "Preferred" is sometimes ...
All instructions writers wrestle with these terms. Just remember that instructions should be absolutely clear, without ambiguity. "Preferred" can be ambiguous. Does a "preferred" printer stay that way? Are you referring to a "preferred" printer, or just a printer to use now?
Select the printer to use (for whatever you are doing).
Avoid "desired" and ...
Screenshots can also come to the right or left of text that references them. Using columns can improve readability and keep illustrations from being separated across pages from the text that references them.