Sustain Pedal (editor, notation, ...)
Sustain Pedal is now available on Flat. You can find those under the dynamics tool-bar.
This performance direction tell to the keyboards players when to press and release the sustain pedal.
The sustain pedal move the dampers away from the strings, so they can vibrate freely.
There are other names for this pedal, such as sustaining pedal, damper pedal or loud pedal