Hello! I was planning to merge in some different parts from some other parts I've downloaded. But every time I insert it it's not the right size that I wanted it to be. Is there any option like to scale it? Newb here.
If it's necessary to separate them on BOM then the best workflow would be to keep both part files separate. For this approach you could basically stop at 4:42 in the video and save the plastic part (with insert subtracted) at this state as its own file. Then insert both the plastic part and the insert in a new assembly. One benefit of using this type of modeling is that both components should automatically position correctly in the assembly. The method shown from 4:42 onward should be used when it is desirable to not have separate BOM items / part numbers. For instance, if the combined plastic body + insert were to represent a single purchased part. Otherwise, the Weldments functionality does allow for "Indented" behavior in a BOM. So if you do ever have a multibody part that needs to be represented on a BOM, it could be converted to Weldment.
The Combine feature used in this video is the most basic and doesn't have such an option. The procedure at 4:42 shows how to copy the solid body ahead of time to preserve the tool body when using Combine. There is a feature called Indent that can do a similar operation but keep the tool body. This video covers it: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-z0BS5NsZm7M.html There is also the Intersect feature which can do the same type of cut and will keep bodies so long as they aren't excluded.