Blink,
There's a few options to do what you want:
* Create an "Object" in the Open Graph area of JFBConnect. Select "Joomla Content - Article". In the New Object editor, set the category to a top-level category for your site (that way all articles will inherit these settings). Then, set the following:
Description Type: Intro Characters
Description Length: 250
* Edit the opengraph plugin to change the defaults we automatically do (10 introtext words). To do so, edit the /plugins/opengraph/content/content.php file. At line 101, you'll see:
$desc_type = 'custom_desc_introwords';
$desc_length = '10';Change that to:
$desc_type = 'custom_desc_introchars';
$desc_length = '250';
The first option is much more flexible as you can set the number of characters or words for a specific category or group of categories. The defaults option is good for doing it site-wide without having to create the Objects.. however, those defaults will get overridden if you upgrade the content open graph plugin in the future.
Hope that explains, but if not, let me know.
On a side-note, what are you submitting for approval about your app, and why is the limit preventing you from submitting it? Just curious to understand your issue more.
Thanks,
Alex