#Loft

Select the first section sketch, then click the following sections in the tree (at least two are needed) and press Enter.

The body passes through all sections in order: an adapter from round to square, a blade, a streamlined housing.

#The order of the sections is the shape

Sections are joined in the order they were picked. Mix the order up and you get a twisted body. The order is visible in the tree, and editing reads the same order.

#Sections on different planes

Usually each section lies on its own plane, and the planes are spaced apart by datums. That makes the distance between sections parametric: move the datum and the adapter stretches.

#A hint

The closer the sections are in the number and placement of their corners, the smoother the transition. A circle and a square stitch well; a circle and a star — as luck has it.

#Solid or surface

The top bar chooses what the result should be: a separate body, a cut/join/intersection with the active body — or a surface. A surface differs from a solid by exactly the caps on the end sections: the skin is there, the volume is not.

This is how a flange, a hood or a transition between two skins is made. Such a surface becomes a solid later — by thickening or by stitching it to neighbouring sheets.