Scrolling (with two fingers on the trackpad) in Preview.app (and TeXShop.app) annoyingly blurs PDF text and I would like to disable the over-compensating anti-aliasing. I like the anti-aliasing while not scrolling just fine.
The image below has two Cmd+Shift+3 screenshots from within Preview, the top half with two fingers still on the trackpad after scrolling, the bottom half after releasing them. The boxed snippets were manually enlarged in Photoshop.
I have disabled two-finger zoom and two-finger rotation in
System Preferences > Trackpad, and unchecked "Use LCD font smoothing when available" in
System Preferences > General.
I have also set various
defaults values, to no avail (the values below are just one combination of many I've tried):
for domain in com.apple.CoreGraphics CoreGraphics -g do echo $domain defaults read $domain | egrep -i 'scal|smooth|alias|scroll' done > com.apple.CoreGraphics > CGFontDisableAntialiasing = 1; > CoreGraphics > CGFontDisableAntialiasing = 1; > -g > AppleAntiAliasingThreshold = 128; > AppleFontSmoothing = 0; > AppleScrollAnimationEnabled = 0; > AppleScrollerPagingBehavior = 1; > AppleShowScrollBars = Always; > NSScrollAnimationEnabled = 0; > "com.apple.mouse.scaling" = "1.5"; > "com.apple.trackpad.scaling" = "-1";
I would like for scrolling to always look like it does if I scroll slowly, and vertically. The ugly anti-aliasing (blurring) is most likely to happen if Preview registers any horizontal scroll (which is rarely intentional), and was more prevalent before I turned off the two-finder scroll.