technova76
That 'shape' is set via css:
.error-code::after {
background-image: url('../images/pattern/bg-title-lead.png');
}
The path of background image is: /templates/ja_donate/images/pattern/bg-title-lead.png
If you want to remove this, you can use this css:
.error-code::after {
background-image: none !important;
}
All custom css should be added to the file: /templates/ja_donate (your default template)/css/custom.css (Create this file if it doesn't exist)
For other questions, as I mentioned in your other topic, pls separate it in different topics so if it will be easier to follow and helpful if others have the same question.