Left Toolbar > Convert Nodes > To M
The To M node converts the input image into a monochromatic image.
input
Img
output
On the left toolbar choose Convert Nodes > To M. >
Drag the To M icon into the Node Graph.
Connect the output of an image node into the Img input in the To M node.
Img
The Image to convert to monochromatic.
Img
The monochromatic image.
Keep Alpha
If checked, the alpha channel of the input image is passed to the output image. Generates an image of MA color mode.