Creating Units

Click Add Unit to create a new unit on the canvas. Click on a unit to select it, then edit its name and cardinality in the blue bar that appears.

Creating Operations

Hold Shift and drag from one unit to another to create an operation. New operations start as "ambiguous" — select the operation line to change its type.

Operation Types

• △ is a kind of — hollow triangle points to the parent type
• ◇ has — hollow diamond on the "whole" side
• ▲ ambiguous — filled triangle, operation not yet defined

Ghost Units

Select a unit and click + Ghost to create a secondary instance that can appear elsewhere in the model hierarchy. Ghosts have a dashed outline and remain linked to the primary — editing the primary's name updates all ghosts. In the text panel, ghosts appear with guillemets: «Name»

Navigation

Hold Spacebar and drag to pan the canvas. Use the + and − buttons to zoom in and out.

Multi-Select

Click and drag on empty canvas to draw a selection box. Use Align to align selected units to the same baseline.

Text Editor

The right panel shows a text description of your model. You can edit the text and click Apply Changes to update the diagram.