# Introduction to Sketching

Learn about sketching basics including the sketch plane, legend, constraints, context menu options, and construction geometry.

Learn about sketching basics including the sketch plane, legend, constraints, context menu options, and construction geometry.

**Sketch Plane**

Select a sketch tool, then select a sketch plane to begin sketching.**Underdefined, Fully Defined, and Overconstrained Sketches**

The Sketch Legend and Model Browser icons indicate whether a sketch curve is underdefined, fully defined, or overconstrained.**Projected or Intersected Sketches**

The Sketch Legend indicates whether a sketch entity is Projected or Intersected.**Sketch Constraints**

Apply geometric relationships such as tangency and perpendicularity to sketch curves.**Sketch Context Menu Options**

Create a sketch imprint, remove constraints, align axes, convert sketches to construction geometry, and show or hide grids, points, constraints, construction lines, dimensions, or intersection curves.**Construction Geometry**

Construction geometry is used as a reference to line up or define other geometry.