How to perform double click with single stroke

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http://www.linuxquestions.org – I received an email suggesting that I post something in LQ.org, well here goes. I am arthritic and I have considerable difficulty with a double click. I also have difficulty when using a mouse of moving the mouse as I select something (click the button) from whatever window I am working with and thereby selecting the wrong thing. To compensate for this difficulty, I use a Logitech trackball and program the center button to perform a double click with one stroke. I am currently struggling with Linux Mint 9 in my search for a Windows alternative. Is there any way to program my ce (HowTos)