The tool Vector Drawing allows to create freehand vector graphics.
By clicking and dragging any shape can be created. After releasing the mouse-button the result will be optimized automatically. The strength of optimization can be controlled by Options/Working/Vector (see chapter 7.10.1.18).
Every click creates a new vector layer. If you want to continue drawing in an existing layer, you have to press and hold Shift.
By
clicking and dragging a new vector layer will be created.
By
clicking and dragging the active vector layer will be modified.