Use the + - keys as spunky linked.
You can also use this in conjunction with the setp command (set precision). Such as
setp veryhigh
And back again with setp default
The shift key (think that's the one - I'm on my phone right now) will lock an object so you can move it and check reference view points.
There are a bunch of excellent videos on YouTube explaining 'advanced' RW building mechanics.
Hope that helps.

