I used to be able to use three finger scroll-up to switch between source/header. Since upgrading to Lion, I it just does a regular scroll. Is there any way to get that feature back?
Aka, it doesn't jump to counterpart when I scroll up / down like it used to.
Apple fixed the issue in Xcode 4.2. So, upgrade your versions.
If you're using an Apple magic trackpad, you'll also need to edit
com.apple.driver.AppleBluetoothMultitouch.trackpad.plist
which can be found in the
/Users/YOURUSERNAME/Library/Preferences
directory. Open it and change the threeFingerVertSwipeGesture key to a 1.
Save the *.plist
I also changed both my App Expose and Mission Control swipes to be 4 finder swipes instead of Lion's default 3 finger swipe.
Restart your computer
Hope that helps!
This stopped working for me in MacOS Big Sur and the plist changes recommended here didn't fix it for me.
What finally fixed it for me was to go to
System Preferences > Trackpad > More Gestures
and change the setting for "Swipe between pages" to "Swipe with two or three fingers". I suspect setting it to "Swipe with three fingers" would also work.