How do you play f7 on alto sax?

To play F♯ (f sharp) on the Alto Saxophone, use the first finger on the left hand to press down the first key (the main octave key) and the second finger on the left hand for the next key down. Additionally, press down the first key on the right hand (the side key). Make sure to maintain a good embouchure and a steady airflow for a clear tone.