Simple enough. Installed elgg 3.3.21 and vision_theme AOK!!!

I spoke too soon. Side panel DISAPPEARS on Android phone.

This all started because the Hamburger button on android to bring up the menu is often impossible to execute on a phone or android tablet. Since those devices represent a substantial portion of devices in use this is VERY important. I've tried it on a Samsung S9 and a Vankyo 7 inch tablet

Try it on even YOUR site elgg.org and see what I'm talking about.

You can use altering view input hook in your plugin, e.g. for 'object/elements/full/attachments'

elgg_register_plugin_hook_handler('view_vars', 'object/elements/full/attachments', 'add_text', 100);

function add_text(\Elgg\Hook $hook) {
    $vars = $hook->getValue();

    $entity = elgg_extract('entity', $vars);
    
    if (!$entity instanceof \ElggEntity) {
     return;
    }

    $attachments = elgg_extract('attachments', $vars);

    $attachments .= 'Contact me if you have a question';

    $vars['attachments'] = $attachments;

   return $vars;
}

Thanks Nikolai and Daviesmolly for getting involved. I'll leave it up to y'all as it's way over my head.

Thanks again

What I did do is create the html (because I wanted it bold/italics/red) of the recurring message I wanted to appear on all posts and saved it to a text editor file which I placed on my desktop and simply copy/pasted it on the create/edit screen in html mode. VIOLA done.

no solution for this tiny little problem?