Understanding the Sketcher terms

Specification Tree

It is a manager that keeps a track of all the operations performed on the model. 

Absolute axis

In the Sketcher workbench, the default horizontal and vertical axes passing from the origin (0,0) to infinity are referred to as Absolute Axis.

Snap to Point

This option is used to snap to the point of intersection of the primary spacing and the graduation lines while sketching.

Construction/ Standard Element

An element that is not part of the profile while creating features and is used only as a reference, or to constrain the elements of the sketch in the sketch in the Sketcher workbench, is called a Construction element.

 Depending on the requirement of the design, you can convert a standard element to a construction element, or vice a versa, using the Construction/ Standard Element button.