Slideshow Gallery plugin configuration settings.
On the Slideshow > Configuration page, at the top-right side of the page you will see a, “Save Settings” box with the “Check/Optimize Database“, “Reset to Defaults“and as well as a checkbox for “Turn on debugging” just above the Save Configuration button. The tabs below outline what each link does.
Clicking the “Check/Optimize Database” link will check your database and optimize it. Tables can crash quite easily, especially when your server unexpectedly shuts down or crashed, or when you’re forced to copy data around when it’s still being accessed. You can then just click this link and your database will optimize and repair automatic.
Clicking the “Reset to Default” link will reset all configuration settings to their defaults as if the plugin was just installed and activated. All other data will remain intact, just settings are reset.
Tick or check the “Turn on debugging” checkbox and then click “Save Configuration” to turn on debugging to reveal any possible WordPress database errors and/or PHP warnings/notices/errors. It essentially turns on WordPress show_errors on WPDB and PHP error_reporting.