Components
Place parts in a Designer assembly as components, give each its own sizes, place whole assemblies as sub-assemblies, move a component, and open the document a component comes from to change it.
Connectors
Mark where a Designer part attaches with connectors - on a flat face, on a hole's or a cylinder's axis, or at a circular edge's centre - and give a hole of several positions one connector per hole.
Joints
Join Designer components by their connectors - fastened, turning, sliding or both - set the angle or offset and the limits, drive a joint by a parameter, and pose the assembly with configurations.
Replicate
Place a Designer component on every connector of a set in one step, such as a screw in every hole of a flange, so the copies follow when holes are added, moved or taken away.
Patterns
Place copies of a Designer component around an axis or along a direction, such as a row of fan blades, with the count and spacing written as expressions and every copy counted in the bill of materials.
Inspect
Check a Designer assembly - the bill of materials that counts every part through every level, the clash check that finds parts that overlap or come too close, and the volume and mass of each part.