What is a combine feature used for in SW?
Combine feature is used to perform simple boolean operations like union, subtract and intersect. For performing the combine the multiple bodies are required.
Here is the tutorial
Answered with a tutorial: https://grabcad.com/tutorials/what-is-a-combine-feature-used-for-in-sw
Combine is typically used for boolean operations in cases where you have multiple bodies in one part. For example, you could do a union on two overlapping bodies and be left with one body (eliminating the doubled material where the bodies might overlap. By default, SW merges overlapping features, however you can uncheck the merge option, leaving you with distinct bodies.
Alternatively, you can perform a subtract or common operation, which are analogous to merely subtracting the overlapping material or keeping only the overlapping material, respectively.