What is the procedure for adding a guide in a composition?

The correct approach for adding a guide in a composition is to drag a guide out from the ruler. This method allows users to easily and intuitively place guides at specific locations on the composition. By clicking and dragging from the horizontal or vertical ruler onto the composition panel, users can create guides that help in aligning and positioning elements precisely within their project.

This method is commonly used because it offers immediate visual feedback, making it easy to adjust the placement of the guide according to the user's needs. The guide will stay locked in place as long as the user wants it, enabling better organization and alignment of layers and compositions.

Other methods listed do not provide a straightforward way of adding guides. For instance, adding a guide from the Layer menu or inserting a Guide Layer from the Effects panel may not be directly relevant to the procedure of creating visible guides like those dragged from the ruler. Additionally, the View menu’s Guide mode is used for controlling the visibility of the guides, rather than adding them to the composition. Thus, dragging from the ruler remains the most effective and simple way to add guides.