#The program window

#At the top — the menu, the path and the bar of the command

• The menu: File, Edit, View, Windows, Help.
• Below it — the path through the document: Assembly › Part › Sketch. It shows where you are, and a click on a link takes you back up. Beside it — Finish (leave the sketch or the part), ƒx Parameters, Snap with the grid and rotation steps, In context.
• With a tool in hand, its bar appears below: modes and switches — "Add / Cut", "To a length / Symmetric" — and the buttons Apply (Enter) and Cancel (Esc).

#On the left — the tools and the tree

The buttons of the current workbench, grouped by meaning, and the tree of the document. The buttons change with where you are: in a sketch — drawing, in a part — operations on the body, in an assembly — parts and joints. If an icon is unclear, rest the pointer on it: the hint says what it does and names its key.

#In the centre — the viewport

The model itself. The numbers of a tool — the height of an extrusion, the radius of a fillet — stand as fields right at the geometry, where they are measured; a field takes a formula. The view cube in the top right corner turns the camera: a face — the front, top or side view, a corner — isometric, an edge — a view at 45°; the house below the cube brings back the whole view.

#On the right — properties

What is selected, what made it, what depends on it, how many degrees of freedom a sketch has left — and what of the made thing is edited without a command: its name, the values of a joint. A tool itself is started with a button on the left, not from here.

#At the bottom — the status

The status line says what is happening now and what the program is waiting for from you; on the right — the coordinates of the pointer and the units.