You put pronouns on a resume either with your contact information in a resume header or under your name.
Here’s how pronouns look on a resume when put with your contact information:
And here’s how they look when you put them under your name:
If your resume is cramped because it’s filled with your work experience, skills, and accomplishments, add your pronouns to your cover letter instead.
In that case, put your pronouns after your name in your cover letter sign-off: