Question

Applications invariably need to define accelerator keys for actions.
Qt fully supports accelerators, for example with QAccel::shortcutKey().

Here are Microsoft's recommendations for accelerator keys, with
comments about the Open Group's recommendations where they exist
and differ. For most commands, the Open Group either has no advice or
agrees with Microsoft.

The emboldened letter plus Alt is Microsoft's recommended choice, and
we recommend supporting it. For an Apply button, for example, we
recommend QButton::setText( tr("&Apply") );

If you have conflicting commands (e.g. About and Apply buttons in the
same dialog), you must decide for yourself.

• About
• Always on Top
• Apply
• Back
• Browse
• Close (CDE: Alt+F4; Alt+F4 is "close window" in Windows)
• Copy (CDE: Ctrl+C, Ctrl+Insert)
• Copy Here
• Create Shortcut
• Create Shortcut Here
• Cut
• Delete
• Edit
• Exit
• Explore
• File
• Find
• Help
• Help Topics
• Hide
• Insert
• Insert Object
• Link Here
• Maximize
• Minimize
• Move
• Move Here
• New
• Next
• No
• Open
• Open With
• Page Setup
• Paste
• Paste Link
• Paste Shortcut
• Paste Special
• Pause
• Play
• Print
• Print Here
• Properties
• Quick View
• Redo (CDE: Ctrl+Y, Alt+Backspace)
• Repeat
• Restore
• Resume
• Retry
• Run
• Save
• Save As
• Select All
• Send To
• Show
• Size
• Split
• Stop
• Undo (CDE: Ctrl+Z or Alt+Backspace)
• View
• What's This?
• Window
• Yes

There are also a lot of other keys and actions (that use other
modifier keys than Alt). See the Microsoft and The Open Group
documentation for details.

The Microsoft book has ISBN 0735605661. The corresponding Open Group
book is very hard to find, rather expensive and we cannot recommend
it. However, if you really want it, OGPubs@opengroup.org might be able
to help. Ask them for ISBN 1859121047.