Preset file created by Line 6 POD HD300 Edit, a guitar effects editor; contains settings that customize the sound of your guitar; settings are found under categories such as "FX," "REVERB," and "GATE;" different settings include speed, bass, drive, treble and channel volume.

To create the H3E file, alter your settings, select File → Save As..., name the file, choose the save location, and click Save. To open the H3E file, double-click the file or select File → Open, navigate to the file, and click Open. In Mac, the default save location for H3E files is in the following directory: /Documents/Line 6/Tones/POD HD300 Edit In Windows, the default save location for H3E files is in the following directory: My Documents/Line 6/Tones/POD HD300 Edit NOTE: The H3E extension was replaced by .H4E when POD HD400 Edit was released. Also, if you want to save more than one preset at a time, create an .H3B file, which can save up to 128 presets.