Knife ToolThe Knife Tool lets you draw a freehand cutting line across any open curve or shape to split the object up into smaller fragments. A scissor-cut feature also lets you tap on any open curve to break the curve at a chosen node or anywhere on a curve segment.
The following settings can be adjusted from the context toolbar:
Straight Line—when enabled, a straight knife stroke can be drawn across your object from a fixed position.
Auto Close—when enabled, the start and end nodes of the knife stroke are connected to form a closed shape that is cut out from the object. The nodes become smooth nodes so a natural curve is created on closing.
For rope mode—drag the stroke end by a 'rope' to smooth the stroke but introduce sharp corners at increasing rope Length (radius) values by redirecting the slackened rope. Set value via vertical slider. For window mode—smooths the stroke by averaging sampled input positions within a Window whose size is configurable. Set value via vertical slider.