@DenisChenu, we are using a textarea for defining the template footer details at our themes via a theme option. That works fine using this code:

OPTIONS.TWIG:
<div class='row'>
<div class='col-sm-12'>
<div class='panel panel-default'>
<div class='panel-heading'>{{ gT("Footer") }}</div>
<div class='panel-body'>
<div class='form-group row'>
<label for='simple_edit_options_footer' class='control-label'>{{ gT("Footer text/copyright (HTML links supported)") }}</label>
<div class="input-group">
<textarea rows="5" cols="200" data-inheritvalue="{{oParentOptions.footer | escape}}" name="footer" class="selector_option_value_field selector__color-picker form-control simple_edit_options_footer" data-id="footer"></textarea>
</div>
</div>
</div>
</div>
</div>
</div>

CONFIG.XML:
<footer>© Company name</footer>

In option.twig : yes, but not by config.xml only.

I mean : i already have a options.twig : https://gitlab.com/SondagesPro/SurveyThemes/skelvanilla/-/tree/master/options?ref_type=heads
But if i want to remove it : need toi update core.

Update the description : options.xml

You are right, at config.xml this is missing. I have adjusted the ticket title since it was mentioning options.xml.

@gabrieljenik, I hope you don't mind if we assign this one to you as well since this is also affecting setting theme options at config.xml so this is similar to your tickets
https://bugs.limesurvey.org/view.php?id=18880
https://bugs.limesurvey.org/view.php?id=18894

@DenisChenu, we already have a solution for text inputs at https://bugs.limesurvey.org/view.php?id=18894. Would you be able to extend this for textareas as well? I think we really need this feature for LS 6.x templates.

@ollehar: This issue is confirmed, but what are the next steps for fixing it? We already have a solution for text inputs at https://bugs.limesurvey.org/view.php?id=18894. Can we add support for textareas in a similar way?

Hm I'm not in the application team anymore, maybe ping @p_teichmann?