Manually Spacing Staves via keybinding and click and drag

I desire to space two staves on one line of music out to make the dynamics and accents more readable. I don’t want to change any setting because I only need it for one line. I have accidentally done this before, but can not remember the key binding or command that just allows you to click and drag. Can you aid me in this endeavor?

Score: https://musescore.com/user/7604006/scores/4823959
(I had to use a link since I’m on a mobile phone)