Is there anyway to use mouse as though you have pressed "Enter" key. Without opening on screen?

Is there anyway to use mouse as though you have pressed "Enter" key. Without opening on screen keyboard. or:Is there anyway to use mouse as though you

Is there anyway to use mouse as though you have pressed "Enter" key. Without opening on screen keyboard.

or:Is there anyway to use mouse as though you have pressed \"Enter\" key. Without opening on screen keyboard.

or:I know some mice come with software that you can reprogram a thumb button to act as a different key.

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