Quiet some instruments, but keep others the same volume

I recently recorded a track with vocals, piano, and guitar. However, the guitar ended up being obnoxiously loud in the recording, while the keyboard and vocals were perfect. Is there an easy way to make the guitar softer without re-recording it?

Adjust the gain on the guitar track. Each track has two sliders to the left of it (along with some other controls like Solo and Mute). The top one is gain. Try knocking the guitar down to -6dB. Then adjust to your ear’s content.