This is from James Chandler in response to this question in another thread:

"The combo slider is designed to be "spring loaded" and return to the midpoint after every drag. It is designed to allow you to scale all the track sliders, and provide enough adjustment range so you can scale all the sliders down to zero or scale them all up to max using a single drag gesture. After you are finished with a drag gesture and release the mouse button, the combo slider automatically returns to the midpoint-- So that the next time you use the Combo slider, you always have adequate space to the left and right of center to have full adjustment range every time you use the combo slider."

It does look strange but it works as he described it.

Bob

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