How to use site template themes in bitrix?

Question

1C-Bitrix

The site template has a themes folder. Question. How to work with her?
For some reason, all articles and even official documentation do not use this folder when creating a template. In general, I can not find anything sensible for this folder on the Internet. Please post an article on this topic. Is it by any chance the subject lines of the template emails?

Answer 1

Themes are not connected automatically, if we take for example the standard "main.interface.form" component, then in the component_epilog.php file, themes are connected manually:

<?php
// ...

if($arResult["OPTIONS"]["theme"] <> '')
{
  $APPLICATION->SetAdditionalCSS($templateFolder.'/themes/'.$arResult["OPTIONS"]["theme"].'/style.css');
}

Answer 2

what is in that folder?

Answer 3

Themes were conceived as a visual design of components in the public part.
In the component settings there is a theme setting - blue, red, yellow.