One position within a band — a 3×2 grid (top/bottom comes from whether it's used as a pageHeader or pageFooter; left/center/right is this align); format is a template string using {token} (see system-field.ts)
align
Optional
One position within a band — a 3×2 grid (top/bottom comes from whether it's used as a pageHeader or pageFooter; left/center/right is this
align); format is a template string using {token} (see system-field.ts)