sdfg
gdfg
Clicgf
Presfg
Use toog
Use tode
sdfg
gdfg
Clicgf
Presfg
Use toog
Use tode
sdfg
gdfg
Clicgf
Presfg
Use toog
Use tode
Click left mouse button to draw spline
Click right button to finish spline
Click right button to select spline and drag markers to edit it
Press Delete button to delete selected spline
Use tool Select to edit spline by left button
Use tool Spline to draw new spline