How do I configure to use a particular cipher?

Soembody said that a connection wasn't working because we needed to use specific ciphers. Regardless if that is true, how do I specify a cipher? Thank you.

ECDHE-RSA-AES256-GCM-SHA384 (Key Exchange=ECDH; Auth=RSA)
ECDHE-ECDSA-AES256-GCM-SHA384 (Key Exchange=ECDH; Auth=ECDSA)
ECDH-RSA-AES256-GCM-SHA384 (Key Exchange=ECDH/RSA; Auth=ECDSA)
ECDH-ECDSA-AES256-GCM-SHA384 (Key Exchange=ECDH/ECDSA; Auth=ECDH)
ECDHE-RSA-AES128-GCM-SHA256 (Key Exchange=ECDH; Auth=RSA)
ECDHE-ECDSA-AES128-GCM-SHA256 (Key Exchange=ECDH; Auth=ECDSA)
ECDH-RSA-AES128-GCM-SHA256 (Key Exchange=ECDH/RSA; Auth=ECDH)
ECDH-ECDSA-AES128-GCM-SHA256 (Key Exchange=ECDH/ECDSA; Auth=ECDH)

WinSCP does not allow configuring specific sipher to TLS/SSL.
Why do you think you need to configure it?