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All hotkeys for Audacity 2 (Linux)

Frequently Used Find zero crossings	Z
Frequently Used Duplicate selection in new track	Ctrl + D
Frequently Used Copy selection	Ctrl + C
Frequently Used Paste selection at cursor	Ctrl + V
Frequently Used Fit all tracks vertically	Shift + Ctrl + F
Frequently Used Sort tracks by name	Alt +O,N
Frequently Used Mute all tracks	Ctrl + U
Frequently Used Selection tool	F1
Frequently Used Time Shift tool	F5
Frequently Used Skip to start	Home
Frequently Used Skip to end	End
Frequently Used Play/Pause	Space
File Menu New	Ctrl + N
File Menu Open...	Ctrl + O
Edit Menu Find zero crossings	Z
Edit Menu Duplicate selection in new track	Ctrl + D
Edit Menu Copy selection	Ctrl + C
Edit Menu Paste selection at cursor	Ctrl + V
View Menu Fit all tracks vertically	Shift + Ctrl + F
Transport Menu Skip to start	Home
Transport Menu Skip to end	End
Tracks Menu Sort tracks...	Alt + O
Tracks Menu Sort tracks by name	Alt +O,N
Tracks Menu Mute all tracks	Ctrl + U
Tracks Menu Unmute all tracks	Shift + Ctrl + U
Tools Selection tool	F1
Tools Envelope tool	F2
Tools Draw tool	F3
Tools Zoom tool	F4
Tools Time Shift tool	F5
Tools Multi-Tool mode	F6
Transport Controls Play/Pause	Space
Transport Controls Play current selection looped	Shift + Space

Similar combinations for other applications

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Microsoft Outlook 2010 (Windows)

Display Format menu

Messages in Main View - Format Message Body

Alt + O

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Tally 9.0 (Windows)

To upload the report to the webe

General Shortcuts

Alt + O

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Microsoft Outlook 2010 (Windows)

Display Format menu

Messages in Compose View - Format Message Body

Alt + O

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Microsoft Outlook 2010 (Windows)

Display Format menu

Calendar Shortcuts - Format Message Body

Alt + O

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Microsoft Windows 7 (Windows)

Open current photo in other application (e.g. Paint of Office)

Photo Viewer

Alt + O

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Directory Opus (Windows)

Folder menu

Menu Bar

Alt + O

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WinRAR (Windows)

Favorites menu

Menu Bar

Alt + O

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Qt Creator (Windows)

Activate Open Documents pane

General

Alt + O

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Pro Tools (Windows)

Project

Window Menu

Alt + O

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FL Studio (Windows)

Open LFO tool when in lower Event Editor area

Piano Roll Action

Alt + O

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Microsoft Outlook 2016 (Windows)

Display the Format menu

Common Commands: Format Text and work with Editor

Alt + O

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Corel VideoStudio X9.5 (Windows)

Media(Gallery)

Navigation/Direction Shortcuts

Alt + O

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CINEMA 4D (Windows)

Sequence fullscreen

Motion Tracking

Alt + O

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Dynamics CRM 2015 (Windows)

Displays the Favorites menu.

MMC Shortcuts(Microsoft Management Console)

Alt + O

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Dynamics AX 2015 (Windows)

Display the Options menu.

General Shortcuts

Alt + O

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Blender 3D (Windows)

Clear Origin

Object Mode

Alt + O

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ACDSee (Windows)

Open ACDSee Pro Options Dialog Box

View Mode

Alt + O

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Chief Architect (Windows)

Move Camera With Mouse - Mouse-Orbit Camera

Camera View

Alt + O

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Brackets (Windows)

Edit File

99 Shortcuts for Brackets (Windows)

Alt + O

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Tencent QQ Player (Windows)

Load Subtitle to Add A Subtitle File

30 Shortcuts for Tencent QQ Player (Windows)

Alt + O

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qBittorrent (Windows)

Options

Tools menu

Alt + O

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MPS 2017 (Windows)

Export contents of a tool window to a text file This feature applies to the Version Control Tool Window, Messages Tool Window, and other tool windows that provide the export button  on the window toolbar

General Shortcuts

Alt + O

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GOM Player (Windows)

Open Subtitles

Subtitles

Alt + O

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Synfig (Windows)

Toggle Onion Skin

73 Shortcuts for Synfig (Windows)

Alt + O

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Pencil2D (Windows)

Onion Skin Previous

57 Shortcuts for Pencil2D (Windows)

Alt + O

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RStudio (Windows)

Fold all

Source

Alt + O

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Visual Assist

Open corresponding file

Text editor

Alt + O

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Mastercam (Windows)

Operations Manager

53 Shortcuts for Mastercam (Windows)

Alt + O

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RStudio

Fold All

Source

Alt + O

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Gmsh 4.1.4

Change projection mode (orthographic/perspective)

General

Alt + O

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Modo (Windows)

Offset Work Plane to geometry position under cursor

Work Plane

Alt + O

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WinRAR

Favorites menu

Menu bar

Alt + O

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NetHack

Offer

Magic

Alt + O

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GeoGebra

degree symbol °

Windows shortcuts

Alt + O

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SuperMemo (Windows)

Options

129 Shortcuts for SuperMemo (Windows)

Alt + O

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Nuclide (Linux)

Toggles the Outline View for a supported file so you can easily navigate to class and function definitions.

Development

Alt + O

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PyCharm 2018.2

Export contents of a tool window to a text file. This feature applies to the Version Control Tool Window, Messages Tool Window, and the other tool windows that provide the export button icons toolbarDecorator export svg on the window toolbar.

General

Alt + O

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Adobe Bridge CC

Open all

Slideshow or review mode

Alt + O

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Aegisub

Configure Aegisub

Default

Alt + O

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Nuke

Clear Out Point

2D compositing viewer

Alt + O

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KMPlayer

Load subtitle

Subtitles

Alt + O

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gedit

Open the Quick Open window

Working with files

Alt + O

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PhraseExpress

In tree view, create a new folder under the cursor

General

Alt + O

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Warcraft III

Activate the Options menu

Menu commands

Alt + O

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Brackets

Edit File

General

Alt + O

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Ardour

Move to original position

Region Operations

Alt + O

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LibreOffice Calc

Displays the options for the current field

Using the pivot table

Alt + O

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Qt Creator

Activate Open Documents pane

General

Alt + O

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Google Sheets (Android)

(in Google Chrome'da) Format menu

Open a menu

Alt + O

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Google Sheets

Format menu (in Google Chrome)

Open a menu

Alt + O

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Midnight Commander

If the currently selected file is a directory, load that directory on the other panel and moves the selection to the next file. If the currently selected file is not a directory, load the parent directory on the other panel and moves the selection to the next file

File panel actions

Alt + O

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Guitar Pro

Wah open

Effects - General

Alt + O

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Blender

Proportional Editing connected toggle

Editing mode

Alt + O

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ACDSee

Opens the ACDSee pro Options dialog box

General

Alt + O

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ACDSee Free

Opens the ACDSee Free Options dialog box

General

Alt + O

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qBittorrent

Option

General

Alt + O

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GOM Player

Open subtitles

Subtitles

Alt + O

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AIMP

File location

Working with Playlist

Alt + O

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Outlook 2016 and Outlook 2013

Display the Format menu

Text formatting

Alt + O

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Winamp Media Player (Windows)

Open options menu

Access Menus and Features

Alt + O

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Microsoft Outlook 2007 (Windows)

Display the Format menu.

Shortcuts for Formatting Text

Alt + O

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Nano

Use of one more line for editing enable/disable

Enable / Disable settings

Alt + O

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