How do you add a dimension to a sketch in Fusion 360?

Adding a dimension to a sketch in Fusion 360 primarily involves using the "Dimension" tool, which is specifically designed for this purpose. When you select the "Dimension" tool from the toolbar, you can click on the entities—such as lines, circles, or points—that you want to dimension. This process allows you to establish precise measurements between different sketch elements, ensuring accuracy in your design.

Using this method not only provides a clear visual way to create dimensions, but it also allows you to specify the dimension type, such as linear or angular, based on the selected entities. This technique is essential for modeling accurately and is a foundational skill in 2D sketching within Fusion 360.

While there may be other methods mentioned, the toolbar method is the most direct and commonly used by designers to dimension their sketches.