elementary OS

General

Window overivew (across all workspaces)

⌘ Cmd + A

All hotkeys for elementary OS

General
App launcher

⌘ Cmd + Space

General
Window switcher

Alt + ⭾ Tab

General
Swtich windows backwards

↑   Shift + Alt + ⭾ Tab

General
Window overview

⌘ Cmd + W

General
Window overivew (across all workspaces)

⌘ Cmd + A

General
Switch workspace

⌘ Cmd + ←  →

General
Workspace overview

⌘ Cmd + S

General
New workspace

⌘ Cmd + 0

General
Jump to specific workspace

⌘ Cmd + 1 - 9

General
Move app windows left and right between workspaces

⌘ Cmd + Alt + ←  →

General
Move window with workspace

↑   Shift + ⌘ Cmd + ←  →

General
Maximize / unmaximize window

Ctrl + ⌘ Cmd + ↑  ↓

General
Lock screen

⌘ Cmd + L

General
Move window

⌘ Cmd + Mouse movement

General
Resize window

⌘ Cmd + Mouse movement

General
Shift

⌘ Cmd

General
Shift

Win

General
Shift

↑   Shift

Similar combinations for other applications


Coda for iOS
Select all
General

⌘ Cmd + A


DaVinci Resolve 15 (Mac)
Select all
Edit menu

⌘ Cmd + A


RStudio (Mac)
Select All
Editing (Console and Source)

⌘ Cmd + A


TextMate
Select all
General

⌘ Cmd + A


Ableton Live 10 (Mac)
Select all Clips/Slots
Session View commands

⌘ Cmd + A


Tableau (Mac)
Select all data
Selection tools (Tableau Desktop)

⌘ Cmd + A


GeoGebra
Select All
Mac desktop

⌘ Cmd + A


Adobe Illustrator (Mac)
Select all
Work with selections

⌘ Cmd + A


Final Cut Pro X
Select all clips
Marking

⌘ Cmd + A


Ace Editor (Mac)
Select all
Selection

⌘ Cmd + A


Total War: Attila (Mac)
Select all
Universal

⌘ Cmd + A


Adobe Lightroom Classic (Mac)
Select all photos
Comparing photos in the Library module

⌘ Cmd + A


Adobe Animate CC (Mac)
Select All
Edit and modify

⌘ Cmd + A


Adobe Dimension CC (Mac)
Select All
Edit menu

⌘ Cmd + A


Roll20
Select everything on current layer
Tools

⌘ Cmd + A


Waze Map Editor
Select Entire Street - mnemonic Select All
Editing Segments

⌘ Cmd + A


Autodesk SketchBook (Mac)
Select All
Tools

⌘ Cmd + A


Adobe Premiere Pro (Mac)
Select All
Edit

⌘ Cmd + A


Corel Painter (Mac)
All
Select menu

⌘ Cmd + A


Adobe XD (Mac)
Select All
Edit menu

⌘ Cmd + A


CodeMirror
Select all
General (Mac)

⌘ Cmd + A


Pixelmator Pro
Select the entire image
Selection tools

⌘ Cmd + A


AWS Cloud9 IDE (Mac)
Select All
Selections

⌘ Cmd + A


Apple iBooks
Select all table borders or cell content, depending on the initial selection
Work with tables

⌘ Cmd + A


Apple iMovie
Select all clips.  To select all clips in the timeline, first click anywhere in the timeline. To select all clips in the browser, first click anywhere in the browser
Selecting and editing video

⌘ Cmd + A


Google Sheets (Mac)
Select all
Common actions

⌘ Cmd + A


Apple Pages
(after selecting a cell) Select all content in a table
Working with tables

⌘ Cmd + A


Apple GarageBand
Select all
General

⌘ Cmd + A


iPad Smart Keyboard
Select all text
Selecting and editing text

⌘ Cmd + A


Xcode
Highlight every item in a document or window, or all characters in a text field (equivalent to the Select All command)
Other system and application shortcuts

⌘ Cmd + A


Apple macOS
Select All items
Cut, copy, paste, and other common shortcuts

⌘ Cmd + A


CoffeeCup Web Editor
Select all
Clipboard

⌘ Cmd + A


iTunes 11 for Mac
Select all the songs in the list
Edit menu

⌘ Cmd + A


Adobe Acrobat 2017 (Mac)
Select or deselect all files
Working with PDF Portfolios

⌘ Cmd + A


Final Draft 11 (Mac)
Select all
Cmd key

⌘ Cmd + A