I don't think there is a built in option, but those commands are just macros, so you can easily set up your own using the TOGL command on the layers instead of SHOW and HIDE.

Have a look at the final part of this article ("troubleshooting" heading) for a bit more on the macros, it should give you enough info that you can construct a toggle macro yourself:

The Frog Tavern is now in the atlas. Thanks @Quenten and @Ricko

Thanks. Added to the atlas now

Maps processed. Thanks @Ricko

If you have Symbol Set 3: Modern, the vector style there contains several vehicles drawn using CC3+. And you can explode the symbols to get a good look at how they are constructed.

As a non-artist, drawing vectors in CC3+ would be my way to go, as I am hopeless with those image editors, and prefer the precision I get with snapping and coordinate/angle inputs.