How can i manage to configure how many % of the width is used to display the content of the article in the ComponentArea
by default we allowed users to choose predefined grid or use custom grid (screenshot above).
The whole rest, if webmaster need - have to customize on its own, using Custom CSS to override default bootstrap 5 grid rules or add its own CSS style.
As You know We do not teach here CSS, but to have a single article in the middle with 50% of width, without using modules. You may use, for example,
@media and (min-width: 780px) {
.view-article .article-details {
max-width: 50%; margin: 0 auto;}
}
it will work for desktop view and tablet.