Some Useful Adobe FrameMaker Spacing Shortcuts

Em Space — Esc + SpaceBar + m
En Space — Esc + SpaceBar + n
Numeric Space — Esc + SpaceBar + 1 (this equals the width of number Zero in that font)
Thin Space — Esc + SpaceBar + t (this equals 1/12th of the width of Em Space in that font)
Nonbreaking Space — Esc + SpaceBar + h
Nonbreaking Hyphen — Esc + Hyphen + h
Suppressed Hyphen — Esc + n + s
Forced Return — Shift + Return/Enter