delete a node from a contour, make sure the contour is
selected in the Object Explorer, and the Contour
and Dot Set Edition tool
is selected in the Toolbar.
Then, move the mouse until the node is pointed. The mouse cursor
. Left click to select the node. The selected node will be
highlighted appearing as a solid
red circle. Once the node is selected, press Delete to delete it.
Alternatively, delete the node by right clicking on the node and
selecting Delete Node from the context menu.