Comment 6 for bug 1592417

cool, I didn't know there were settings for it, thanks Pat! :)

If tweaking the settings doesn't work out, you can try having a look at the code.
I'm not familiar with the code that handles the swipe gestures, but I had a quick look and I think the gesture area on the left is defined here
http://bazaar.launchpad.net/~unity-team/unity8/trunk/view/2440/qml/Launcher/Launcher.qml#L395

while the are on the right side is defined here
http://bazaar.launchpad.net/~unity-team/unity8/trunk/view/2440/qml/Stages/PhoneStage.qml#L716

Note: that's PhoneStage, but it seems there is also a TabletStage and DesktopStage implementing the same area. Not sure how Unity8 switches from what to the other

have fun!