This article reproduces the printed Elgato Stream Deck Quick Start Guide.
There also are many articles available that describe how the software works in depth:
Creating a Folder
Custom Titles for Actions
Customizing Key Icons
Game Capture HD integration
Step 1 - Connect Stream Deck
Connect Stream Deck directly to a USB port on your PC or Mac – do not use a USB hub.
Step 2 - Download Stream Deck app
Download and install the Stream Deck app:
Step 3 - Launch and Customize Stream Deck
Launch the app to customize Stream Deck.
Drag action from the right panel and drop them onto your desired keys on the left.
Step 4 - Use Custom Icons
Configure your actions and personalize keys with custom icons.
Use 72 x 72 pixels .jpg or .png files to achieve best results.
Step 5 - Create Folders
Drag and hold one key over another to create a folder.
Tap the back key to exit a folder and return to your main configuration.
Step 6 - Right-Click Keys to Modify
Right-click keys to Copy, Delete, or Reset them.
Step 7 - Use Stream Deck's Stand
Prop Stream Deck on the included stand and adjust the legs for optimum access.
Step 8 - Use Social Media Accounts
Enter your Social Media accounts in the Preferences to connect with your fans.