Editing Lua extensions (section)

== Install and use an extension without programming ==
An extension is an optional feature package. You do not need to understand Lua to use one.

# Connect to a server and open '''Catalog''' in the footer.
# Find a package for the feature you want and choose '''Preview Selected''' to inspect it.
# Choose '''Install Selected''', review any dependencies and files, then select '''Install'''.
# Open '''Extensions''' and check that the package appears under '''Installed'''. If it does not load, read '''Problems'''.
# Use the feature in the appropriate place: Modulation for signal modes, Add-ons for audio processing, Theme for appearance, or Extensions > Tools for actions.

[[File:SimTX-0.3.6-extensions.png|thumb|center|800px|alt=Extensions window with Installed, Tools, and Problems tabs and package management buttons.|Installed packages and the features they provide. The Problems tab is the first place to check a loading error.]]

To try a theme, choose one from '''Theme''' and return to '''System''' to restore the default appearance.

=== Enable an audio processor ===
# Select a supported mono audio source, such as an audio file or microphone.
# Open '''Add-ons''' and tick the processor's Enabled checkbox.
# Select its row and choose '''Configure''' to adjust its controls.
# Use '''Move up''' or '''Move down''' to change processing order. Listen to the result with a short transmission.

[[File:SimTX-0.3.6-audio-addons.png|thumb|center|750px|alt=Audio add-ons window showing Enabled checkboxes, Configure, Move up, Move down, and Disable all.|Enabled processors run from top to bottom. Installing an add-on and enabling it are separate steps.]]

Direct IQ, white noise, and PipeWire Stereo do not pass through this mono-audio add-on chain. Details are in [[Lua audio add-on API]].

To write your own package, continue to [[Creating Lua extensions]]. The type and environment reference below is available when needed.