PDF (adobe.com)

Draw bitmap objects

  1. Select the Pencil tool .

  2. Set tool options in the Property inspector:

    Anti-aliased
    Smoothes the edges of the lines you draw

    Auto Erase
    Uses the fill color when the Pencil tool is clicked over the stroke color

    Preserve Transparency
    Restricts the Pencil tool to drawing only in existing pixels, not in transparent areas of a graphic

  3. Drag to draw. Shift-drag to constrain the path to a horizontal, vertical, or diagonal line.