You can use the Section.CanGrow and Section.CanShrink properties to control the layout of report sections and fields.
For example, if you set both properties to true, a section or field automatically adjusts vertically to print or preview all the data it contains.
When a section grows or shrinks, its Section.Height property does not change. To retrieve the actual (adjusted) height, use the Section.RenderHeight property.
You can make fields grow or shrink to match the size of the section by setting their Field.Anchor property.