# Introduction to Sketching

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

- Sketch entities cannot be moved with the Move tool. You must reopen the sketch to edit it.

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

Tip:

- Sketch entities cannot be moved with the Move tool. You must reopen the sketch to edit it.

**Sketch Plane**

Select a sketch tool, then select a sketch plane to begin sketching.**Sketch Legend**

The Sketch Legend in the upper left corner of the modeling window indicates whether a sketch entity is Projected or Intersected, and whether a sketch curve is Underdefined, Fully Defined, or Overconstrained.**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.**Sketch Units**

All sketch data and parameter entities are handled according to the current unit system. All dimension values, variable manager values, and sketch entity data like line length, circle radius, or point position are appended with the current units system.