[Q] Is there a way......keep S3 from shutting off screen while in cradle?

Hello-

I keep my S3 in a cradle connected to my computer on my desk. The cradle connects the S3 to my computer and charges it.

Is there any way to keep the S3 screen ON indefinitely (or at least longer than default selections in settings) while it is plugged in? I still want the screen to shut off after X minutes when it isn't plugged in.

Thanks.