What feature of Fusion 360 allows the addition of constraints to a sketch?

The Sketch Constraints toolbar is specifically designed for adding constraints to sketches in Fusion 360. This toolbar provides quick access to various types of constraints, such as coincident, parallel, perpendicular, and tangent, which help define the geometric relationships between sketch entities. By using constraints, users can control the behavior of the sketch elements, ensuring they behave predictably during modifications.

The other options, while related to sketching in Fusion 360, do not specifically serve the primary function of adding constraints. The Sketch Palette provides additional functions and options like creating new geometries and managing parameters, but it does not focus on constraints directly. The Constraints dialog box may allow for some management of existing constraints but is not the primary tool for adding them. The Dimension tool primarily focuses on adding dimensions for sizing elements rather than establishing relationships between them. Thus, the Sketch Constraints toolbar stands out as the main feature dedicated to this function.