What is the keyboard shortcut for marking an out-point in a timeline?

The keyboard shortcut for marking an out-point in a timeline is indeed the letter 'O'. This is a standard shortcut used in many video editing programs, including Adobe Premiere Pro and similar software, to denote the end of a selected segment within a timeline. By using this shortcut, editors can efficiently navigate their projects without having to rely solely on the mouse, speeding up their workflow.

Understanding this function is critical for effective timeline management, as marking in and out points (with 'I' for in-point and 'O' for out-point) allows for precise trimming and editing of clips. This skill is essential for any video editor looking to enhance their editing efficiency and precision.