I would like to change the number of characters displayed on the first page of a published post. Currently, I think 100 characters are displayed, but even though I’m using a brief description, the text is still cropped.
Is there any user CSS parameter to change this globally for all posts and possibly individually setup it for individual posts longer, shorter?
Login to your WP dashboard and go to Appearance > Customize > Excerpt there you can change the excerpt length (Word) for the post. Make sure that for Grid Post Layout view maximum excerpt length is 126 character.
For individual excerpt length you can add the text in Excerpt option which you can find at the right side of the post editor page.