Hi Ioannis,

I guess to load that file after all .css files also from components, am I right?

If yes, please follow two steps:

1. Rename file from custom.css to override.css
2. In Template Options > Custom Code > Before end of < / head > please add that line

<link href="/templates/poidisplay/css/override.css" rel="stylesheet" type="text/css" />

Yes, later you can still edit that file from Joomla Template Editor.

Hi it worked override.css leads to success thank you very much