Space Handle
In 3D sketching, a graphical space handle helps maintain your orientation
while you sketch on several planes. The space handle appears when the
first point of a sketch entity is defined on a selected plane. Using the
space handle, you can select the axis along which you want to sketch.
When sketching on a 3D plane, no graphical
assistant is displayed since you are creating a 3D sketch in 2D space.
By default, you sketch relative
to the default coordinate system in the model. To switch to one of the
other two default planes, click the sketch tool and press Tab.
The origin of the current sketch plane is displayed.