Python IDLE for Windows

File menu

Open module

`Alt` + `M`

All hotkeys for Python IDLE for Windows

File menu Create a new editing window	`Ctrl` + `N`
File menu Open an existing file	`Ctrl` + `O`
File menu Open module	`Alt` + `M`
File menu Show classes and methods in current file	`Alt` + `C`
File menu Save current window to the associated file	`Ctrl` + `S`
File menu Save current window to a new file, which becomes the associated file	`Ctrl` + `↑ Shift` + `S`
File menu Save current window to different file without changing the associated file	`Alt` + `↑ Shift` + `S`
File menu Print window	`Ctrl` + `P`
File menu Close current window	`Alt` + `F4`
File menu Close all windows and quit IDLE (asks to save if unsaved)	`Ctrl` + `Q`
Edit menu Undo last change to current window (max 1000 changes)	`Ctrl` + `Z`
Edit menu Redo last undone change to current window	`Ctrl` + `↑ Shift` + `Z`
Edit menu Copy selection into system-wide clipboard; then delete selection	`Ctrl` + `X`
Edit menu Copy selection into system-wide clipboard	`Ctrl` + `C`
Edit menu Insert system-wide clipboard into window	`Ctrl` + `V`
Edit menu Select the entire contents of the edit buffer	`Ctrl` + `A`
Edit menu Open a search dialog box with many options	`Ctrl` + `F`
Edit menu Repeat last search	`Ctrl` + `G`
Edit menu Find selection	`Ctrl` + `F3`
Edit menu Find in files	`Alt` + `F3`
Edit menu Open a search dialog box for searching files	`Ctrl` + `H`
Edit menu Go to line	`Alt` + `G`
Edit menu Show call tip	`Ctrl` + `\`
Edit menu Show surrounding parents	`Ctrl` + `0`
Edit menu Show completions	`Ctrl` + `Space`
Edit menu Build	`Ctrl` + `B`
Edit menu Build	`Ctrl` + `↑ Shift` + `F10`
Edit menu Run the program	`F5`
Miscellaneous Check module	`Alt` + `X`
Miscellaneous Comment region	`Alt` + `3`
Miscellaneous Uncomment region	`Alt` + `4`
Miscellaneous Tabify region	`Alt` + `5`
Miscellaneous Untabify region	`Alt` + `6`
Miscellaneous Toggle auto coloring	`Ctrl` + `/`
Miscellaneous Toggle tabs	`Alt` + `T`

Similar combinations for other applications

Microsoft Outlook 2010 (Windows)

Choose From account from which to send message

Messages in Main View - Manage Messages

`Alt` + `M`

Tally 9.0 (Windows)

Email the report

General Shortcuts

`Alt` + `M`

Microsoft Outlook 2010 (Windows)

Choose From account from which to send message

Messages in Compose View - Manage Messages

`Alt` + `M`

Microsoft Outlook 2010 (Windows)

Choose From account from which to send message

Calendar Shortcuts - Manage Messages

`Alt` + `M`

VLC Media Player (MacOS)

Open media menu

Manage VLC, Playlists, and Special Commands

`Alt` + `M`

WinRAR (Windows)

Add archive comment

Commands Menu

`Alt` + `M`

Directory Opus (Windows)

Move menu

Operations Toolbar

`Alt` + `M`

Pro Tools (Windows)

Paste special - Merge

Edit Menu

`Alt` + `M`

Calibre (Windows)

Merge selected records, keeping originals

Library Management

`Alt` + `M`

Qt Creator (Windows)

Activate Bookmarks pane

General

`Alt` + `M`

Autodesk Maya 2015 (Windows)

Default Hotbox Style (Zones and Menu Rows)

Interfaces

`Alt` + `M`

Skype for Business (Lync) 2016 (Windows)

Start Meet Now

Main Window

`Alt` + `M`

Microsoft Outlook 2016 (Windows)

Choose the account from which to send a message

Mail

`Alt` + `M`

Autodesk Maya 2017 (Windows)

Default Hotbox Style (Zones and Menu Rows)

Interfaces

`Alt` + `M`

Microsoft Word 2016 (Windows)

Mailing tab

Access Shortcut

`Alt` + `M`

Daz 3D Bryce 7 (Windows)

edit 3D Textures

Object

`Alt` + `M`

Daz 3D Bryce 7 (Windows)

Deep Texture Editor

Palettes and Labs

`Alt` + `M`

ACDSee (Windows)

Move current item to a folder you specify

View Mode

`Alt` + `M`

Steinberg Cubase 9 (Windows)

Mute/unmute objects

Edit

`Alt` + `M`

Lightworks (Windows)

Selected Section of Audio Moves from Source Track to Destination Track

31 Shortcuts for Lightworks (Windows)

`Alt` + `M`

eSignal (Windows)

MOB

49 Shortcuts for eSignal (Windows)

`Alt` + `M`

Sierra Chart (Windows)

Move Drawing

Tools Menu

`Alt` + `M`

Synfig (Windows)

Select Mirror Tool

73 Shortcuts for Synfig (Windows)

`Alt` + `M`

Creo Parametric (Windows)

Model Menu

26 Shortcuts for Creo Parametric (Windows)

`Alt` + `M`

Visual Assist

List methods in file

Text editor

`Alt` + `M`

TalkDesk Callbar

Mute call

General

`Alt` + `M`

PSPad (Windows)

Clipboard Monitor window

Tools

`Alt` + `M`

Wordfast Pro (Windows)

Open TM Menu

100 Shortcuts for Wordfast Pro (Windows)

`Alt` + `M`

WinRAR

Add archive comment

Commands menu

`Alt` + `M`

Gmsh 4.1.4

Toggle visibility of all mesh entities

General

`Alt` + `M`

GeoGebra

mu μ (Press Shift for upper-case: Μ)

Mac desktop

`Alt` + `M`

NetHack

Special ability

Magic

`Alt` + `M`

Altium Designer (Windows)

Fit model

PCB3D Library Editor Shortcuts

`Alt` + `M`

Winamp

Minimize Winamp

General

`Alt` + `M`

Total War: Attila

Toggle music

Universal

`Alt` + `M`

Microsoft Word 2016

To manage Mail Merge tasks, or to work with envelopes and labels, open Mailings tab

Ribbon: Access keys

`Alt` + `M`

Ardour

Switch between editor and mixer window

Window visibility

`Alt` + `M`

PSPad

Clipboard Monitor window

Tools

`Alt` + `M`

REAPER

Edit: Mute events (toggle)

Section: MIDI Inline Editor

`Alt` + `M`

Qt Creator

Activate Bookmarks pane

General

`Alt` + `M`

Google Sheets

(in Google Chrome) Form menu

Open a menu

`Alt` + `M`

Lightworks

Selected section of audio moves from source track to destination track

General

`Alt` + `M`

Microsoft Excel 2016

Open the Formulas tab and insert, trace, and customize functions and calculations

Ribbon: Access keys for tabs

`Alt` + `M`

ACDSee

Moves the current item to a folder you specify

General

`Alt` + `M`

Blender

Merge menu

Editing mode

`Alt` + `M`

SketchUp

Tape measure tool

Misc.

`Alt` + `M`

Notepad2

Modify lines

Block

`Alt` + `M`

Nano

Mouse support enable/disable

Enable / Disable settings

`Alt` + `M`