Hi there,
Currently, there are no setting to configure them as it is hardcoded to truncate at 250. If you wanted to achieve this, you can apply attached file below at this path template/your_current_template/html/com_easysocial/albums/layouts/info.php *template override
Here are codes that i changed
[gist type="php"]
<!-- orignal -->
<?php if ($options['view'] != 'all') { ?>
<div data-album-caption class="es-media-caption es-album-caption">
<?php echo $this->html('string.truncater', nl2br($album->_('caption')), 250); ?>
</div>
<?php } ?>
<!-- customised -->
<?php if ($options['view'] != 'all') { ?>
<div data-album-caption class="es-media-caption es-album-caption">
<?php echo $this->html('string.truncater', nl2br($album->_('caption')), 0); ?>
</div>
<?php } ?>
[/gist]