[size=7]3ds max General Shortcuts[/size]
1. Pressing the letter 'O' turns off the bounding boxes when panning.

2. Pressing X with toggle the transform gizmos on and off

3. Right click a spinner to zero its value

4. Press the 7 above the letters on the keyboard for an in-viewport poly/vertex counter.

5. Hit Ctrl+N in any numeric input field you access the 'Numerical Expression Evaluator', a simple calculator.

6. Right clicking the transform controllers brings up the Transform Type-In window.

7. Right clicking any of the snaps toggles will bring up Grid and Snap Settings.

8. Hitting Q repeatedly toggles through different selection modes.

9. F3=Smooth/Shade view toggle.

10. F4=Wireframe overlay (Show Edges) toggle.

11. both Ctrl+V and Shift-Dragging clones the selected object.

12. W, E & R are the shortcuts for Move, Rotate and Scale respectively.

13. H = Selection Box (Select by List) shortcut

If you have the new selection box (max 2008+) and want the old one do the following...

find your CurrentDefaults.ini
(usually in something like... C:\yourname\yourname\AppData\Local\Autodesk\3dsmax\2009 - 32bit\enu\defaults\MAX

and change :
[Scene Explorer]
SelectByNameUsesSceneExplorer=1

to

[Scene Explorer]
SelectByNameUsesSceneExplorer=0

save ini file and restart max

14. Spacebar = Lock Selection, this can be hit by accident and you will be unable to select/deselect objects so its good to know to deactivate too.
15. Alt+Q enters isolation mode allowing you to temporarily hide all non selected objects and zoom extents selected.

16. F12 will bring up the keyboard input window for the currently selected transform tool allowing precise values to be used.

17. ALT+D toggles the 'Snaps Use Axis Constraints'. With Vertex Snap, lets you quickly align vertices in only one or two dimensions.

18. SHIFT+X toggles the Edge Constraint. With Vertex Snap, allows you to align vertices in one or two dimensions without deforming the edge(s)

19. Ctrl-Tab switches to different tabs in dialog windows (i.e. render setup dialog).
more tips and trick

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