Sound Forge Pro provides several editing methods. To set the editing mode for the active editor, choose Edit > Mode, and choose a command from the submenu or click a mode button in the playbar below the waveform.
Time Mode : in this general-purpose editing mode, you can create time selections in the waveform to manipulate audio. For more information, see "Selecting data using the mouse."
Event Mode : in this mode, you can edit nondestructively, using multiple audio files in a single editor. For more information, see "Event-based editing."
Pencil Mode : in this mode, you can perform precision edits by drawing directly in the waveform. For more information, see "Pencil Mode."
Envelope Mode : in this mode, you can use envelopes to adjust effect parameters over time. For more information, see "Automating effect parameters."