1. A computer-implemented method comprising: receiving an indication that a lockable display has locked to, or is beginning a process to lock to, a computing device or an existing display associated with the computing device, the computing device presenting content on the existing display; and causing the computing device to switch presentation of the content from the existing display to the lockable display or to present the content jointly over the existing display and the lockable display, the causing performed without user selection or interaction other than to lock the lockable display.