Preferences

Customize Diagrammix3 to match your workflow through the Preferences panel.

Opening Preferences

Access preferences via:

  • Diagrammix3 → Preferences... (Cmd+,)

Appearance

Theme

Choose how Diagrammix3 appears:

  • System: Matches your macOS appearance (Light or Dark mode)
  • Light: Always use light theme
  • Dark: Always use dark theme

Theme Selection

Canvas Settings

Grid

Configure the grid overlay on your canvas:

  • Show Grid: Toggle grid line visibility
  • Snap to Grid: When enabled, shapes align to grid intersections when moved or resized
  • Grid Size: Adjust the spacing between grid lines (8px, 16px, 24px, etc.)

The grid helps maintain consistent spacing and alignment across your diagram.

Smart Guides

  • Enable Smart Guides: When enabled, alignment guides appear as you drag objects, showing when edges or centers align with other objects

Smart guides work independently of the grid and can be used together or separately.

Rulers

  • Show Rulers: Display measurement rulers along the top and left edges of the canvas

Rulers help with precise positioning and sizing of elements.

UML Settings

UML Guidance

  • Enable UML Guidance: When enabled, provides suggestions and validation for UML diagrams to help ensure correct notation

This is helpful when learning UML or when diagram accuracy is important.

Default Styles

Set default appearance for new objects:

  • Default Fill Color: Color applied to new shapes
  • Default Stroke Color: Border color for new shapes
  • Default Font: Font family for new text

These defaults apply to all new documents.

Performance

  • Hardware Acceleration: Use GPU for rendering (recommended for complex diagrams)
  • Smooth Scrolling: Enable for smoother canvas navigation

File Handling

  • Auto-save: Automatically save changes at regular intervals
  • Create Backup: Keep backup copies of your documents