The shortcut keys activate or perform various frequently used program functions.

a   Again (repeat latest action)
b   Bend
c   Reserved
d   Drop selected objects to a level
e   Reserved (coordinate lock)
f   Fit view to selected objects
g   Grid on/off
h   OpenGL on/off
i   Invisible on/off
j   View to object 
k   Object view
l   Extend (change Length)
m   Move 
n   Enter numeric mode 
o   Mirror (Opposite)
p   Open property window 
q   Reserved (coordinate lock)
r   Rotate 
s   Scale
t   Configure view for modeling in object space
u   Reset from modeling in object space 
v   Reserved for view compass
w   Reserved (coordinate lock)
x   Reserved (coordinate lock)
y   Reserved (coordinate lock)
z   Reserved (coordinate lock) 

A   Animate by path / Add SDS edge

B   Create Backdrop / SDS bevel
C   Create Camera from the current view
D   Create Subdivision cube / Destroy SDS face
E   Reserved for modifiers
F   Fit to selected handles or object
G   Create group
H   Extrude tool (H for Height) / Extrude SDS face
I   Create vertical axis line (looks like I)
J   Create NURBS curve by control points
K   Create NURBS curve by knotpoins
L   Create Level
M   Create MetaBall / Merge SDS vertices

N   Create NURBS mesh
O   Create analytic cylinder (O-like cross section)
P   Particle tool
Q   Reserved for modifiers
R   Create analytic Rectangle
S   Create analytic Sphere / Subdivide SDS face / Split SDS edge
T   Parallel (Texture) mapping tool / Tunnel SDS faces
U   Create analytic cube 
V   Create analytic cone (sharp V like shape)
W   Reserved for modifiers
X   Reserved for modifiers
Y   Reserved for modifiers
Z   Reserved for modifiers

Ctrl a  Select all
Ctrl b  Define render box for view window
Ctrl c  Copy
Ctrl d  Duplicate
Ctrl f  Font tool
Ctrl g  Execute current macro
Ctrl i  Invert selection
Ctrl l  Load file
Ctrl m  Macro recording on/off
Ctrl n  New project
Ctrl p  Pause/continue macro recording
Ctrl q  Save active view window contents to an image file
Ctrl s  Save file
Ctrl t  Deselect
Ctrl r  File render window
Ctrl v  Paste
Ctrl x  Cut
Ctrl y  Redo
Ctrl z  Undo
 

1   Reserved as modifier (iplane horizontal lock)
2   Reserved as modifier (iplane vertical lock)
3   Reserved as modifier (iplane normal lock)
4   Reserved as modifier (lasso selector)
5   Reserved as modifier (snap to nearest point)
6   Reserved as modifier (snap to curve)
7   Front View
8   Side View
9   Top View
0   Ray trace current view


Space     Edit mode on/off
Alt Space Selection Painter
Home      Reset view
Insert    Move pivot point
Del       Delete selected object/point/face etc.

!   Animation record on/off
§   Create distant light
@   Create ambient light
£   Create point light
$   Create spot light
&   Boolean And
%   Boolean And Not
/   Hide wire geometry
*   Perspective on/off

-   Backwards 1 frame
+   Forward one frame
>   Play animation/stop animation
<   Rewind animation
)   Tracking on & play animation
(   Camera tracking off
#   Ground plane drawing on/off
;   Reset grid origin
=   Reserved

?   Unused
[   Unused
]   Unused
{   Unused 
}   Unused

F1   Reserved
F2   Select window show/hide 
F3   Toolbar show/hide
F4   Control bar show/hide
F5   View bar show/hide
F6   Choreographs
F7   Animation bar show/hide
F8   Numeric show/hide
F9   Status show/hide
F10  Reserved
F11  UV editor
F12  Color window

Ctrl F2  Info window 
Ctrl F3  Scripting window
Ctrl F4  View property window 
Ctrl F5  Floating view window 

Modifier keys

Modifier keys affect the performed program functions while they are pressed down. They do not start any operation or tool.

Input plane constraints

1               Lock to horizontal direction of input plane
2               Lock to vertical direction
3               Lock to normal direction
Shift           Lock to nearest axis

Object space constraints

q               Lock to horizontal direction of object space
w               Lock to vertical direction
e               Lock to normal direction

World space constraints

x               Lock to horizontal direction of absolute space
y               Lock to vertical direction
z               Lock to normal direction

Grid control by mouse click/dragging

. (dot)         Set hotpoint 
Alt . (Alt+dot) Set hotpoint for all views

Snapping

5               Snap to nearest point
6               Snap to curve
Ctrl            Snap to selected objects only
Alt             Snap to current level objects only
Alt             Snap to existing points in SDS object face creation
Shift           Grid snapping off for SDS face, edge and vertex handle moving
                and object translation handles 

Mouse projection to 3D

, (comma)       Project LMB click to underlying surface
, (comma)       3D snap (don't project a dragged point to input plane) 

Object and handle selection

Shift           Add to selection (OR)
Ctrl            Intersection with previous selection (AND)
Ctrl            Range select: select all from previous selected to clicked one 
Shift Ctrl      Invert selection (XOR)
Alt             Subtract from selection
4               Lasso selector in dragging

View navigation by the right mouse button

Shift           Zoom (change view angle/zoom scale)
Ctrl            Pan (move camera)
Alt             Rotate camera about aimpoint
Shift Ctrl      Move camera forward/backward
Shift Alt       Rotate in 45 degree steps
Ctrl Alt        Adjust camera banking
Shift Ctrl Alt  Adjust camera banking in 45 degree steps

View navigation by the middle mouse button

Shift           Move camera forward/backward
Ctrl            Pan (move camera)
Alt             Rotate camera about viewpoint
Shift Alt       Rotate camera about viewpoint in 45 degree steps

View cruising with cursor keys

Tab             View camera cruising on
Tab+Shift       Turbo boosted cruising
Tab+Up          Accelerate
Tab+Down        Decelerate
Tab+Left        Turn left
Tab+Right       Turn right
Tab+Alt+Up      Turn up 
Tab+Alt+Down    Turn down
Tab+Alt+Left    Bank counterclockwise
Tab+Alt+Right   Bank clockwise
Tab+Ctrl+Up     Move up
Tab+Ctrl+Down   Move down
Tab+Ctrl+Left   Move left
Tab+Ctrl+Right  Move right
Tab+Left+Right  Turn towards horizontal flight

Create/modify tools

Shift  Uniform 3D scale/45 degree rotate grid/Uniform rectangle and cube
Ctrl   Duplicate at modify ( transformation handles only )
Alt    Instance at modify(via handles)/Snap to existing SDS points 

Compass menus

v compass       View tools
y compass       Light sources & texture tools
q compass       Create tools
w compass       Wire compass
e compass       Modify tools

x compass       Reserved
z compass       Reserved

1 compass       Unused (reserved for user compass)
2 compass       Unused 
3 compass       Unused

Geometry modify tools

b   Bend
i   Invisible on/off
l   Extend (change Length)
m   Move 
o   Mirror (Opposite)
r   Rotate 
s   Scale
/   Hide/show wire geometry

Object hierarchy editing tools

d   Drop selected objects to a level
L   Create Level
&   Boolean And
%   Boolean And Not
Ctrl a  Select all
Ctrl c  Copy
Ctrl d  Duplicate
Ctrl i  Invert selection
Ctrl t  Deselect
Ctrl v  Paste
Ctrl x  Cut

Animation tools

!   Animation record on/off
-   Backwards one frame
+   Forward one frame
>   Play animation/stop animation
<   Rewind animation
)   Tracking on & play animation
(   Camera tracking off
A   Create path animation

Light sources

§   Create distant light
@   Create ambient light
£   Create point light
$   Create spot light

Gui elements

p    Property window
F2   Select window show/hide 
F3   Toolbar show/hide
F4   Control bar show/hide
F5   View bar show/hide
F6   Choreographs
F7   Animation bar show/hide
F8   Numeric show/hide
F9   Status show/hide
F11  UV editor
F12  Color window

Ctrl F2  Info window 
Ctrl F3  Scripting window
Ctrl F4  View property window 
Ctrl F5  Floating view window 
Ctrl+r   File render window
Ctrl+l   File load window

View window

f   Fit view to selected objects
g   Grid on/off
h   OpenGL on/off
j   View to object
k   Object view
t   Configure view for modeling in object space
u   Reset from modeling in object space 
*   Perspective on/off
#   Ground plane drawing on/off
;   Reset grid origin
0   Zero key ray traces the current view
7   Front View
8   Side View
9   Top View

Ctrl b  Define render box for view window
Ctrl q  Save view to image file

SDS editing

A   Add edge
B   Bevel
D   Destroy face
H   Extrude face
M   Merge SDS vertices 
S   Subdivide face / Split edge
T   Tunnel faces

Creation and construction tools

B   Create Backdrop
C   Create Camera from the current view
D   Create Subdivision cube
F   Font tool
G   Create group
H   Extrude tool
I   Create vertical axis line (looks like I)
J   Create NURBS curve by control points
K   Create NURBS curve by knotpoins
L   Create Level
M   Create MetaBall
N   Create NURBS mesh
O   Create analytic cylinder (O-like cross section)
P   Particle tool
R   Create analytic Rectangle
S   Create analytic Sphere
T   Parallel (Texture) mapping tool
U   Create analytic cube 
V   Create analytic cone (sharp V like shape)
§   Create distant light
@   Create ambient light
£   Create point light
$   Create spot light

Unused keys for user shortcuts

?   Unused
[   Unused
]   Unused
{   Unused 
}   Unused
Alt combinations are reserved for user's own shortcuts