Selecting Audio - the basics
Most Audacity operations involve selecting a range of audio in one or more tracks, then deleting or moving the selection or applying an effect to it which changes its sound.
Typical use of Audacity only requires that you know two ways of selecting audio: selecting the entire project or selecting a region.
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 the cursor using the mouse.
If Selection tool is not selected (default setting), choose
from Tools Toolbar, below:
Then 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.
