Array panel
With an array selected

A star repeated in a row ( linear array ) and the Array panel: copies, steps, rotation and scale

When it appears

With an array selected. The header tells you the mode: Array, Radial array, Path array.

Fields

FieldWhat it does
Copieshow many copies, from 1 (the slider goes up to 24, the box beyond)
Rel X / Rel Ylinear: offset per copy in multiples of the source
Gap X / Gap Ylinear: extra offset, in units of measure
Radiusradial: the distance from the center of the circle
Directionradial: the direction of the center of the circle
Stepradial: the angle between two copies
Rotationlinear and on a path: extra rotation per copy
Scalescale per copy
Rotatethe copies rotate; when off they stay upright
Followon a path: the copies follow the direction of the guide path

Which rows

ModeRows
linearCopies, Rel X, Rel Y, Gap X, Gap Y, Rotation, Rotate, Scale
radialCopies, Radius, Direction, Step, Rotate, Scale
on a pathCopies, Follow, Rotation, Scale