ENiGMA½ comes with an advanced theming system allowing system operators to highly customize the look and feel of their boards. A given installation can have as many themes as you like for your users to choose from.
Themes live in `art/themes/`. Each theme (and thus it's *theme ID*) is a directory within the `themes` directory. The theme itself is simply a collection of art files, and a `theme.hjson` file that further defines layout, colors & formatting, etc.
ENiGMA½ comes with a default theme by [Luciano Ayres](http://blocktronics.org/tag/luciano-ayres/) of [Blocktronics](http://blocktronics.org/) called Mystery Skull. This theme is in `art/themes/luciano_blocktronics`, and thus it's *theme ID* is `luciano_blocktronics`.
For information on art files, see [General Art Information](general.md). In general, to theme a piece of art, create a version of it in your themes directory.
:memo: Remember that by default, the system will allow for randomly selecting art (in one of the directories mentioned above) by numbering it: `FOO1.ANS`, `FOO2.ANS`, etc.!
| `name` | :+1: | Name of the theme. Be creative! |
| `author` | :+1: | Author of the theme/artwork. |
| `group` | :-1: | Group/affils of author. |
| `enabled` | :-1: | Boolean of enabled state. If set to `false`, this theme will not be available to your users. If a user currently has this theme selected, the system default will be selected for them at next login. |
### Customization Block
The `customization` block in is itself broken up into major parts:
| `defaults` | Default values to use when this theme is active. These values override system defaults, but can still be overridden themselves in specific areas of your theme. |
| `menus` | The bulk of what you theme in the system will be here. Any menu (that is, anything you find in `menu.hjson`) can be tweaked. |
Each *key* in the `menus` block matches up with a key found in your `menu.hjson`. For example, consider a `matrix` menu defined in `menu.hjson`. In addition to perhaps providing a `MATRIX.ANS` in your themes directory, you can also theme other parts of the menu via a `matrix` entry in `theme.hjson`.
*`config`: Override and/or provide additional theme information over that found in the `menu.hjson`'s entry. Common entries here are for further overriding date/time formats, and custom range info formats (`<someFormName>InfoFormat<num>`). See Entry Formatting in [MCI Codes](mci.md) and Custom Range Info Formatting below.
*`mci`: Set per-MCI code properties such as `height`, `width`, text styles, etc. See [MCI Codes](mci.md) for a more information.
Many modules support "custom range" MCI items. These are MCI codes that are left to the user to define using a format object specific to the module. For example, consider the `msg_area_list` module: This module sets MCI codes 10+ (`%TL10`, `%TL11`, etc.) as "custom range". When theming you can place these MCI codes in your artwork then define the format in `theme.hjson`:
:warning: ***IMPORTANT!*** Do not make any customizations to the included `luciano_blocktronics' theme. Instead, create your own and make changes to that instead:
3. If desired, you may make this the default system theme in `config.hjson` via `theme.default`. `theme.preLogin` may be set if you want this theme used for pre-authenticated users. Both of these values also accept `*` if you want the system to randomly pick.