<a name="trackerThickness"><h3 style="padding-top: 40px; margin-top: 40px;"></h3></a>
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**trackerThickness(val)** Sets the thickness of the slider's tracker, 1 being full thickness. This is the line that follows the slider when you move it. To disable the tracker you can set its thickness to 0 or it's alpha colour channel to 0. 

