Fusion Fundamentals and the Interface
What the interface is really organized around
Fusion is built around a single design file (the document) that holds components, sketches, bodies, and the feature history in one place. The Application Bar at the top gives you the file menu, workspace switcher, and search; the Toolbar below it changes with the active workspace (Design, Sketch, Manufacture, Drawing, Render, Animation, Simulation). The Browser on the left is the document's outline: it lists the origin, user parameters, components, bodies, sketches, construction geometry, and every feature in order. The ViewCube and navigation bar control orientation, and the timeline across the bottom replays the ordered feature history.
Concepts to know
Understand the distinction between a component and a body: components are containers that carry their own origin, sketches, and bodies, while bodies are the actual geometry. Know that the timeline is chronological and that editing or reordering a feature rolls the model back to that point. Learn the difference between the top-level document and the active component, and how activation changes where new geometry lands. Also know where preferences, units, and document settings live, and how the marking menu (right-click) and the S key shortcut palette speed up work.
Traps
Questions often confuse the Browser with the timeline, or claim that deleting a feature leaves dependent features intact. Another common trap is assuming a new sketch always belongs to the top-level document when a component is active. Also watch for claims that the toolbar is identical across workspaces.
Rule of thumb
Before any command, ask: which component is active, and where will the result appear in the Browser and timeline? If you cannot answer, activate the intended component first.