Why like computer games we have some secret tools in Max?! if they are useful why not readily available or visible in root menus for users and if they are inefficient why don't remove them?
Some Samples:
1. Character Assembly:
http://help.autodesk.com/view/3DSMAX/2018/ENU/?guid=GUID-96C4CC13-0135-4CBB-90D4-EC13153EE44E
For Exam if this tool is useful why we have not this feature in somewhere like Group menu? and for using this must go to "Customize User Interface", create a toolbar and drag related icons to toolbar?!
2. Polar and Ortho snapping mode:
http://help.autodesk.com/view/3DSMAX/2018/ENU/?guid=GUID-250646D9-296A-4658-8D88-0867D70FCF8C
http://help.autodesk.com/view/3DSMAX/2018/ENU/?guid=GUID-066537A8-3268-4725-82E4-ED4E31CF8B49
Useful tools for drawing 2D lines but I don't know why they are secret tool in "Customize User Interface"! maybe useful if add them to snap toolbar ... .
3. Numerical Expression Evaluator:
http://help.autodesk.com/view/3DSMAX/2018/ENU/?guid=GUID-B8CBF0C7-B901-4A87-8D20-778BBE12BEA6
If press CTRL+N on Spinner in Max you can see this useful features but How many users know about this shortcut? I think will be useful if add this feature to right click on Spinner too.

Also maybe many other useful features be in Max and many user like me don't know about these only for bad UI orginize ...