Change a setting in Preview Save Dialog

Big Sur Preview app is changed. A new behavior has been introduced.

Saving a jpg from a pdf (Cmd-S or Export) brings up a Save dialog box with the ppi set to 72. Can I set it to say 144ppi? I have Default Folder, but I don't think that's a factor.

(Yes, Cmd-S from an opened pdf is defaulting to jpg. These changes don't make sense and one other at discussion.apple.com has questioned the behavior. https://discussions.apple.com/thread/252392717).

Tested in Catalina:

Add an Execute AppleScript action and paste this:

activate application "Preview"
tell application "System Events"
tell process "Preview"
	-- insert GUI Scripting statements here:
	set value of text field 4 of sheet 1 of window 1 to "144"

end tell
end tell

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And I can confirm this AppleScript works in Big Sur too.

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