Loft and sweep¶
Loft blends between profiles, and Sweep pushes a profile along a path.
For a loft, draw two sketches on different planes, such as a circle and a square. Choose Loft, click both profiles and press Enter, and you have a round to square adapter. Clicking a profile again drops it.
A sweep needs a closed profile in one sketch and an open curve in another. Draw the profile at the start of the path and roughly square to it, then click it and pick the path.