Custom Fields
*************

You can either define your custom fields in source code by following steps in the :doc:`../developer-guide/fields` chapter or you can use GUI to create them in the WP admin in section *"Horizon > Fields"*.

Each field is defined by its:

- name
- unique identifier
- required flag
- description
- input type
- value type
- metabox

There are many input types available. We can categorize them by their behaviour:


+----------------+---------------------------+------------------------------------------------------------------------+
| Input type     | Number of accepted values | Variations                                                             |
+================+===========================+========================================================================+
| single line    | 1                         | text, small text, medium text, email address, URL, embed media         |
+----------------+---------------------------+------------------------------------------------------------------------+
| multiple lines | 1                         | textarea, smaller textarea, code textarea, wysiwyg editor              |
+----------------+---------------------------+------------------------------------------------------------------------+
| picker         | 1, 2 or 3                 | time, date, timezone, date and time, date and time and timezone, color |
+----------------+---------------------------+------------------------------------------------------------------------+
| checkbox       | 1 (true / false)          | checkbox                                                               |
+----------------+---------------------------+------------------------------------------------------------------------+
| checkboxes     | many                      | multicheck, multicheck inline                                          |
+----------------+---------------------------+------------------------------------------------------------------------+  
| radio          | 1                         | radio, radio_inline                                                    |
+----------------+---------------------------+------------------------------------------------------------------------+
| select         | 1                         | select                                                                 |
+----------------+---------------------------+------------------------------------------------------------------------+