The shortcuts below cover the most common operations in Composer Desktop. Some operators (notably HSV Keyer) use the function keys F1–F12 for additional bindings — see the per-operator documentation for those.
Inputs
Shortcut
Description
Ctrl + Up / Down
Rearrange the order of the inputs.
Scene preview area (mouse within the preview area)
Shortcut
Description
Ctrl + F
Fit content to the scene preview window (zooms the view; does not change any layer).
Ctrl + Shift + F
Scale the selected layer to fit the scene, preserving its aspect ratio, and re-center it.
Ctrl + +
Zoom in one step.
Ctrl + -
Zoom out one step.
F11
Toggle full-screen mode (works globally across Composer). Press Esc to exit full-screen mode.
Ctrl + Space
Move / pan the preview area.
Shift + drag corner handle
Lock the aspect ratio while resizing the selected layer.