Can I transfer RIF to TFSA?

Excuse me, I was wondering if I could clarify something about transferring funds into a TFSA. Specifically, I'm interested in transferring RIF, or Registered Income Fund, funds into a Tax-Free Savings Account. Is this possible, and if so, what are the steps I need to take? I understand there are certain rules and regulations surrounding TFSAs and retirement funds, so I'd like to ensure I'm doing everything correctly. Thank you for your time and assistance.