EXD.3:4.2 - Make the correspondence available where it is used

Use consistent names, units and referents. Put a label beside the quantity or feature it names, or give an unambiguous cross-reference when the medium prevents proximity. Make a line, arrow or spatial arrangement’s meaning explicit when it could denote different relations.

In human instructional use, select signaling, proximity, meaningful segmentation or preparation of a needed concept for the actual difficulty. Signal the next relation rather than highlighting everything. Keep a meaningful inference together within a segment. Let a recipient revisit an earlier step when the medium allows it.

Coordinate simultaneous channels so their contributions can be used together. Words may explain what a diagram’s relation means; duplicating a long text while narration and animation compete for attention may add burden. Select the arrangement under the actual task, recipient and medium conditions, retaining text when it provides needed access or reference.