How to > View > Show direction in a viewport
  
Show direction in a viewport
To display the global direction axes (X, Y, Z)
1. Click 3D Access and then, in the Window group, click the arrow next to More.
2. Under Properties, click Viewport. The Vport dialog box opens.
3. Click the Axes check box.
Creo Elements/Direct 3D Access displays the global direction axes in the top left corner of the viewport. (You may need to move the Vport dialog box to see it, however.)
To switch off the global direction axes, clear the Axes check box.
Learn more
See Advanced Topics, Work with viewports.