Working with UCS

Any 2D or 3D objects can create on XY plane only

Dynamic UCS

Detect the face of solid automatically

XY plane automatically align on the face when cursor hover over

UCS Icon

Show UCS Icon at Origin (Default)
Displays UCS icon at origin only

Show UCS Icon
Display UCS icon either at origin or at the corner of the viewport

Hide UCS Icon
Hide the UCS icon

UCS and Icon Settings

If the icon set to be selectable - You can change the options in the Properties palette
Each viewport in model space can be set to different UCS

Moving UCS Origin

Moving UCS from one point to another allows you to work on the different location

Face UCS

 

Working with faces that points are not easy to select

3 Point UCS

Allows you to define the direction of X, Y Z axis

View UCS

Allows you to add text to the Isometric view

Named UCS

Allows you to reuse the custom UCS