What keyboard shortcut will add a rotation keyframe at the current time indicator?

The keyboard shortcut that adds a rotation keyframe at the current time indicator is Shift + Alt/Opt + R. This combination is specifically designed to streamline the process of animating layers by allowing you to quickly set a keyframe for the rotation property.

In Adobe After Effects, adding keyframes is a fundamental aspect of creating animations, and knowing the shortcuts can significantly enhance workflow efficiency. When you use the Shift + Alt/Opt + R shortcut, the rotation property of the selected layer will automatically get a keyframe placed at the layer’s current time indicator position. This allows you to jump straight into animating the rotation without the need to manually navigate through menus or panels.

The other options do not have the same programmed functionality in After Effects. For example, Ctrl + R is generally associated with displaying the rulers in your composition, while Alt + R and Shift + R do not correspond to specific keyframe actions for rotation. Therefore, using Shift + Alt/Opt + R becomes the most efficient and direct way to add a rotation keyframe when working on your animation projects.