I have opened an image with LibreOffice Draw. I would like to draw a free line on that image, that is to push the mouse button, drag the mouse around, and have the computer track my movements and draw a curve on the image accordingly, until I release the button. Everywhere I search I see "use the curve tool" (or specifically its "freeform line" sub-tool), but the curve tool smoothes my curve, so that I end up with something quite different to what I actually draw. It makes it quite difficult to draw letter shapes, for example.
Is there a way to have Draw just draw what I draw, without any smoothing or other effects?