Text Annotation

Labelling part of a circuit

Drop a Text annotation near a group of components and type a short caption such as "Clock domain". The label sits on the canvas and moves with your view but plays no part in the logic. A one-line caption is often enough to remind a future reader what a cluster of gates is for.

Using type to build a hierarchy

Vary font size, weight, style and color to signal importance: a large bold title, a smaller italic subtitle, a colored note, a monospace signal name. This visual hierarchy lets a reader scan the sheet and grasp its structure at a glance, the same way headings organize a written document. Color coding is one of the most effective ways to distinguish categories of information.

Callouts on a schematic

Place short Text callouts next to the stages of a datapath ("sum stage", "carry path", "latched here") to explain what each block does. Well-placed labels attach meaning directly to the geometry of the diagram, so the reader does not have to reverse-engineer the intent from the wiring. A visual notation is only as effective as the extent to which its symbols are explained; annotations close that gap.