A fully defined sketch is a 2D drawing in CAD software in which all lines, shapes, sizes, and placements are strictly restricted by measurements and geometric restrictions.
A fully defined sketch means
- Every line
- Every circle
- Every arc
is completely constrained.
Sketch color: Blue = Under Defined, Black = Fully Defined, Red = Over Defined
Advantages
- Stable model
- Better rebuild
- Easy editing
Why It Matters
- Prevents unintended changes when other designers open or modify your project files.
- Changing a dimension updates the shape predictably while not breaking or distorting other sections of the model.