Custom Header template showcase and discussion

a ok, cool.

I made an exception config for the iPhone in the meantime, using @ludeeus horizontal marquee, which works fine in itself.
It does show the odd ‘n’ after each line and header though, don’t know how ro get rid of them. Since I already use the >- multiline indicator, I would have hoped this to be sufficient blocking the new lines? Maybe that is something in the footer itself, because I almost literally copied @ludeeus entry, and his screen movie clearly shows its working alright in the header.

This is my exception:

  - conditions:
      user_agent: iPhone
    config:
      footer_mode: true
      header_text: >-
        Ha Rpi4:
        {% set alerts = namespace(active=[], color="var(--google-red-500)") %}
        {% set temperature = namespace(inside=states('sensor.temperatuur_living'), outside=states('sensor.temp_current'), color="var(--primary-text-color)", symbol="°C") %}

        {% if states('sensor.weatheralerts') | float != 0 %}
        {% for alert in state_attr('sensor.weatheralerts', 'alerts') %}
        {% set alerts.active = alerts.active + [alert['title']] %}
        {% endfor %}
        {% else %}
        {% set alerts.active = alerts.active + ['No active alerts'] %}
        {% endif %}

        <marquee>
        <span style='color: {{ temperature.color }}'>
            Inside temperature: {{ temperature.inside }}{{ temperature.symbol }}
            Outside temperature: {{ temperature.outside }}{{ temperature.symbol }}
        </span>
        <span style='color: {{ alerts.color }}; margin-left: 10px;'>
            Alerts: {{ alerts.active | join('  -  ')}}
        </span>

        <span style='color: {{ temperature.color }}'>
        {{states('sensor.dark_sky_summary')}}
          Daily -  {{states('sensor.dark_sky_daily_summary')}}
          Hourly - {{states('sensor.dark_sky_hourly_summary')}}
        </span>
        </marquee>

      menu_hide: true
#      voice_hide: false
      options_hide: true