blue bar floats across screen
Ipad just began showing blue-lined box around screen apps, etc. Blue inch-wide bar floats across screen at start-up. I have rebooted over and over. Also, having trouble with e-mail--can't slide inbox up or down to retrieve e-mails. Screen-touch reacts not at all or very slowly in e-mail. Having trouble accessing internet as well. Help!
iPad, iOS 7.0.1