To construct an open curve , select the open curve tool,
either by clicking on the open curve button or by selecting
Tools->Open Curve (Ctrl-K).
To construct a closed curve , select the closed curve tool,
either by clicking on the closed curve button or by selecting
Tools->Closed Curve (Ctrl+Shift-K).
Use the left mouse button to click on each vertex in the
path. There is no way to specify the location of the
defining the
curvature of the path whilst the
path is under construction, however, once the
path has been completed, it is possible to move these
control points using the
||.
To complete the path, do one of the following:
Double-click instead of single-clicking on the final vertex:
this performs the combined function of defining the vertex and
finishing the path. If you use this method, be careful not to
accidentally6.1 create two
coincident vertices at the end point, or it will cause a problem for
any mid or end || that you apply.
Single-click on the final vertex and then
complete the path by pressing the Enter key or by
clicking on the finish button or by selecting
Tools->Finish.
If you have used the closed curve tool, the path will automatically
be closed by inserting a curve between the end vertex
and the initial vertex.