The new belt locking QOL function?

[irbork]

It looks really nice from what is shown.
I'm curious if it will be even more awesome and it will allow to build wider belt lanes in a single run.
Will you be able to move your cursor sideways in respect to belt direction right after the first segment is placed to determine how many lanes you want to place, and then as you more any tile forward or back it will get locked to that width?