???? Not really sure what you mean there? If you mean instead of single clicking a file to open it, you want to double click it, this would be part of the options of the window manager/desktop environment, not hardware.
So check the control center, and maybe in the mouse section or preferences you might find the option for that. If you need help finding it, post the window manager you are using, and maybe some of what you have tried.
Cool
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