Hands
Data space. Drag a point to move it. right-click
anywhere adds a point; so does double-click on empty space, or
+ add a point. Delete with double-click on a point or
× in the table. Every x and
y in the table is editable. Drag a square handle
on the line to pivot it, or the line itself to slide it.
Parameter space. The mouse only moves the camera — drag to
orbit (3D) or pan (2D), shift-drag to pan, scroll to zoom.
The w and b sliders
and the line itself are the only things that move the point.