To manage easy space move 2 solutions :
1. With view simple widget
3 areas control movements in space.

Area 1 :
Close : Close the window
Update : Query parameter and update values
Ratio On : Conserve ratios (view calculation, see mapping.win for expert users)
XYZ,... : Orient the view marker
View No : Current view number
Arrows : Move in 2D straight, left, top, bottom. The centre button recenters the object in the graphic window.
Area 2 :
Scale Phi : Modify the horizontal angle
Scale Theta : Modify the vertical angle
Scale Dist : Z modified PRP (PRP : Projection Reference Point)
Scale Zoom : Modify the view plane
Area 3 :
Default : Calculate a default view
Reference : Display the XYZ marker
File : Generate the source file for the current view (GuiViewSimplexx.c)
Expert : Access to PHIGS expert views
Mouse Control : Intuitive control of movements in space.
By holding down the corresponding mouse button :

The FLY control is carried out from the centre of the window. The further the cursor is from the centre, the larger is the animation.
The bounding box is RED next to X min and GREEN next to X max.
2 With popup - menu in worksation (access with button 3)

Buttons for mouse control are unsensitive ( default )
Activate Mouse Ctrl : Initialization and rotate / zoom activation
Rotate : Rotation with button 1
Zoom : Zoom with button2 on Y axies
Pane : shift in space
Fly : Fly in space ( point (0,0) in screen center ) (keep button press)
Bounding Box (Only) : Display bounding box only
Bounding Box (With) : Display bounding box and object
Default (Reset) : Compute defaut view
Reference : Display reference
z Buffer : Set / Unset hidden line hidden surfaces
View Mode : Rotation axe X, Y or Z up
View Type : View type ( parallele or perspective )
Warning:
When Rotate is activate, it is possible to move bounding box only with <shift> key.
For panning when Rotate is activate press <Control> key.
This popup-menu is unset with XmNmouseCtrlMenu resource of workstation widget

For PHIGS program this popup-menu i avalaible with %mc (yes/no) directive in configuration file GPHIGS.def, and option list is set with %ml (abcdef...) option. (see chapter 8)