Ah, right. Thanks!
So next I should go looking for the equivalent of “keep normal constant” from Solidworks’s sweep feature. 
Anyway, looking back to the first question of the first page is really a facepalm on my behalf. 
Not since that first page have I ever needed to do what I asked about. One should really not be allowed to use Alias without taking a few courses first (which is a statement which really takes an effort for me to write, being a former interface designer).