The background fill feature allows a solid color or fill pattern to fill an entity or region behind another specified content. Background fill can be pre-set for the entity, or it can apply fill patterns or colors specified in the data. It can also be defined to apply only when a specific output condition is met.A common use for background fill is to prevent background graphics from printing through. In this fence report, a solid white background is used to prevent the axis grid from showing through the fenceposts:
Background fill can also be used to mark output when a contingency condition is met, allowing you to automatically highlight data that meets the condition, in this case, sand backfill in a well: