Comments

#// at the start of a line

A line whose first non-whitespace characters are // is removed before anything else reads the source. It leaves nothing behind — no paragraph, no blank block.

scene{
    // the fit degree here is deliberate — see the note below
    A straight line captures the trend.
}

Only at the start of a line. // following any other content is ordinary text: Real text. // trailing compiles to a paragraph reading Real text. // trailing.

#@ignore for a block

@ignore takes a body and drops all of it — the way to comment out a construct rather than a line.

@ignore{
    curve(expression: x^3; colour: grey)
}

#Comments inside lines{}

Inside a lines chunk the body is literal code, so // is interpreted by the pane's language rather than by Chalk. A JavaScript comment reaches the rendered pane unchanged.