Lock/Unlock

The Lock/Unlock   constraint fixes a selected sketch element in its current position and the Unlock constraint removes any locked constraint.

To use the Lock or Unlock constraint:

1. Select an endpoint or center point in the sketch.
2. From the constraints menu, select Lock or  Unlock.
   Note: You can also directly selector on sketch points.

Learn more by watching the video below:

Locked sketch points are shown as a solid blue color. For more information, visit States of sketch points.