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I have a Logitech Trackman Marble and I really love it. I spend a lot of time on web browser and code editors. I was wondering if there could be a feature like when I press Option Key the trackball becomes a scroll wheel. So that I can use the trackball for both moving cursor and scrolling.

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@techie007 Thanks! The first question you mentioned seemed to be what I was trying to do. But there wasn't a solution for Mac:( – woodings Apr 7 '13 at 20:37
up vote 7 down vote accepted

You can use KeyRemap4MacBook:

<autogen>__PointingRelativeToScroll__ PointingButton::NONE, ModifierFlag::FN | ModifierFlag::NONE</autogen>

Replace ModifierFlag::FN with VK_CONTROL for either control. Keys that aren't modifier keys can be mapped to EXTRA1:

<autogen>__KeyToKey__ KeyCode::F1, KeyCode::VK_MODIFIER_EXTRA1</autogen>
<autogen>__PointingRelativeToScroll__ PointingButton::NONE, ModifierFlag::EXTRA1</autogen>

Key Repeat > [Pointing Device] CursorMove to ScrollWheel Rate changes the scrolling speed.

See the source for the key code values and predefined settings.

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Thanks! KeyRemap4MacBook does exactly what I needed. I'm using Fn+CursorMove to ScrollWheel:) – woodings Apr 8 '13 at 6:30

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