The Graphene slider uses the post excerpt text (if you’ve set your “Slider display style” to “Thumbnail and excerpt” or “Background image and excerpt”). Unless you’ve manually set your post excerpt, the automatic excerpt is used (the first 55 words of the post).
This is not the same as the ‘<!–more–>’ tag.
To show the excerpt field, you’ll have to manually change your screen options for the post editor (the dropdown in the upper right-hand corner).
One of the easiest ways I’ve found to edit post excepts in bulk is with the Excerpt Editor plugin. There’s some more helpful excerpt information here: https://op111.net/67/.
We use a rotating slider on our site with current “news flash” stories. I’ve configured it to 200px height. You can also use line breaks to push the “View Full Post” button to be consistently against the bottom. It takes a little guesswork, but if you’re picky about that sort of thing, it’s well worth it.
