Selecting Audio - the basics
For further details and graphical examples please see the Selecting Audio page.
Selecting the entire project
You can select the entire length of all tracks on screen with or use the shortcut CTRL + A (or CMND + A on a Mac).
See also: Automatic Select All, if none selected
Selecting a region using the mouse
The easiest way to select a region of audio is to click and drag. If it's not already selected, choose the Selection tool
from Tools Toolbar, below:
Now click the left mouse button anywhere inside of an audio track, and click and drag to the other edge of your selection, and release.
Automatic Select All, if none selected
There is a setting in Tracks Preferences called "Select all then act on entire project, if no audio selected" that enables Audacity to automatically select the entire project if you have made no explicit time selection.
If this preference is unchecked, all menu items and buttons requiring an audio selection will remain grayed out until audio is selected.
