Cocoa offers three scroll bar variants:
- DoubleMax (default) shows the up/down arrows at the bottom of the scrollbar
- Single shows the up arrow at the top and the down arrow at the bottom of the scrollbar
- DoubleBoth shows the up/down arrows both at the top and bottom of the scrollbar
The variant can be changed on the command line:
defaults write "Apple Global Domain" AppleScrollBarVariant [variant]
ESScrollView supports DoubleMax and Single, but when set to DoubleBoth the scrollbar reverts to the Cocoa aqua-look.