How to turn on touchpad beside a hook-up keyboard on dell laptop?

xXTheReg...

Unhappy to hear almost your device issue.
Unfortunately, this volition not effort for you because you have a mouse connected and an external keyboard. Whether you need another device you can contact our Dell Spare Parts Department from the link beneath.
If you need further assistance you can email me from my email address in my sig file below.

Dell Spare Parts Department -1-877-717-3355
http://accessories.America.holler.com/sna/delli…

thanks ,
Dell-Jesse L
Dell Social Media and Communities
email jesse_leonard@dell.com