Sketching Essentials

Accurate Snapping

Curves must snap accurately when used for surface modeling.

When a vertex snaps to a curve or another vertex:

• The vertex color changes from purple to blue-green. This color is customizable via Preferences > Appearance > Supporting Color.
• A subtle small dot appears at the intersection point and connecting point of a curve and line.

These visual indicators confirm that the geometry is properly connected.

• To snap precisely:
  • When moving a vertex, hold Ctrl to enable snapping.
  • While sketching, snapping works automatically if Object Snapping is enabled (no Ctrl needed).
• For more details, see Snap.

Snap Reference Lines

• When drawing, you can create temporary reference lines to aid snapping. Point the cursor to an object and tap Shift. Snappable reference lines will appear.

Specify Dimensions Numerically

• You can specify the dimensions and angles of a sketch numerically: press the Tab key and a numeric input box will appear on the dimensions.

Constrain to an Axis

• Press the X/Y, or Z key to constrain the cursor's movement to a single axis.

Use Knife Mode

• Use Knife mode to cut one or more Faces as you draw a Curve. You must snap to points on the target Faces as you draw.