Using the Design workspace and Form contextual environment has its benefits when working with certain models.
Fusion offers a lot of modeling freedom because of its parametric modeling and direct modeling environments. The parametric modeling environment allows to create models that must abide by dimension and relations. On the contrary, the Form contextual environment allows to design geometries without the need to follow the rules of inputting specific values.
The following video explains the advantage of using both of these modeling environments. Key concepts and best practices include:
Length: 4:46