Remove module borders

[Windwood]

Is there a way to remove all module borders from my site. I seem to remember that I instituted them all from one single location a long time ago, but can't remember where. I have managed to deal with just one of them individually but I don't think this is the most effective route. Any help appreciated.

https://wvwaterfalls.com/

[cmbay]

It appears that you are using the card Module Style (on the Advanced tab). Try the noCard style or one of the system module styles.

When you are able, pass the site through an HTML validator and fix all the reported errors.

While you're working on the site, disable JCH Optimize.

[Windwood]

Thank you, Charles. Do I have to edit each module individually or is there a central location to accomplish this. I checked Global Configuration-Modules and there are no settings there.

[cmbay]

Do I have to edit each module individually or is there a central location to accomplish this. I checked Global Configuration-Modules and there are no settings there.

I couldn't find it either. Also, it is apparently not available as a batch process. Perhaps someone with more knowledge of the subject will post an answer here soon.
If you have more than a few dozen to do, you might try modifying the database through an SQL query in the PHPMyAdmin of your hosting company's control panel. I've had success with asking Perplexity.ai to construct the query for me.

[Per Yngve Berg]

The Default Style is set in the template for each position.

See jdoc statements.