Your first part

This walkthrough makes a small rounded plate and exports it as STEP. It uses the shipped workspace affordances: the feature creator, the 2D sketch editor, hotkeys from the shortcut registry, and the Export dialog.

Start a document

From the documents page, create a new document or open a sample. The workspace top bar shows the document title, a mode switch for Model / Sketch / Assembly / Drawing, an Export icon button, and the Assistant entry point. Press ? any time to open the shortcut sheet, or ⌘ K / Ctrl K for the command palette.

Sketch a profile

Press S or click Add feature → Sketch…. Pick a base plane such as XY (top) and start with a rectangle or circle. For freeform work, select the sketch in the outliner and click Open 2D editor. The 2D editor supports line, arc, circle, rectangle, polygon, ellipse, spline, slot, trim, offset, sketch fillet, sketch chamfer, mirror, construction geometry, and dimensions. Use D for dimensions and Esc to cancel the pending tool or leave the sketcher.

Extrude and fillet

With a closed sketch available, press E or choose Add feature → Extrude…. Select the sketch as the profile, enter a distance in millimetres, and keep Operation: Add (union) for a boss. To cut material, use Operation: Subtract (cut).

To round edges, select one or more model edges and press F or choose Fillet in the feature creator. Enter a radius and add the fillet. Kerf stores topology references from the OCCT kernel, so downstream selections are tied to kernel IDs and lineage rather than mesh triangles.

Export STEP

Click the top-bar Export button. Choose STEP and either the active part or whole document scope, then click Export. STEP is the preferred exchange format for editable CAD handoff; STL, 3MF, OBJ, glTF, IGES, PNG viewport captures, and document ZIP bundles are also available where noted in the file-format reference.