PR 263324 points out that we should mention virtualization as alternative to modifying partition data.
Since the PR almost has been overcome by events, I've updated the bsdinstall chapter to include references where it makes sense
- Adding a TIP pointing to virtualization
- Adding a reference to virtualization as alternative to changing partitions
Admittedly, I'm a little unsure about the second placement. It might be better to move it to the end of point 2 "Decide Where to Install FreeBSD"