Access Self-Service Banner by going to https://go.lehigh.edu/UpdatePersonalInfo
Enter your Lehigh credentials (e.g. juk222)
You now see a page called My Profile.
Click on the card labeled Personal Information 
You will then see a card labeled Personal Details. Personal Pronoun is located in the bottom middle. If you wish to update this value (or any value in this card) click Edit in the top right of this card.
Another window will display providing the ability for you to update some of the values in this section.
Changing Legal Name
Note: it is not possible to change your legal name via Self-Service Banner. Please see Updating Chosen Name and Gender Identity at Lehigh#ProcessforChangingLegalName for more info on how to do this.
Click on the Personal Pronoun drop down and choose the appropriate value. Click Update.
Chosen Name & Gender Identity Policies
To review the official policies, please go to:
Chosen Name Policy at go.lehigh.edu/chosennamepolicy
Gender Identity Policy at go.lehigh.edu/genderidentitypolicy