GUI / Usage Manual

Window Area Overview

If started in graphical mode, crystal_facet_uml shows a window with

  • toolbar on top,

  • drawing area in the center,

  • element configuration widgets to the right and

  • an optional notification bar at the bottom.

Tool Bar

Create/Use DB

  • Opens an existing database file or creates a new database file


  • Exports all diagrams to the selected folder (supported formats are txt, png, pdf, ps and svg)

New Window

  • Opens another window on the same database.

This option allows you to work reliably with multiple windows on the same database.





  • Cut all pink-cornered elements to the clipboard (features of classifiers are copied if the classifier is selected)


  • Copy all pink-cornered elements to the clipboard (features of classifiers are copied if the classifier is selected)


  • If the clipboard contains a diagram, this diagram is pasted below the current diagram. All other elements are pasted into the new diagram.

  • If the clipboard does not contain diagrams, classifiers and relationships from the clipboard are copied into the current diagram.

  • If the name of a classifier is identical to an existing one, an instance of the existing classifier is pasted to the diagram. Otherwise a new classifier is created.


  • Deletes all pink-cornered elements. This operation may fail if a marked diagram contains unmarked elements.


  • Toggles the pink-cornered classifiers between classes, named instances and anonymous instances.

  • No effect on relationships and features.


  • Toggles the pink-cornered classifiers between yellow-marked, greyed-out and normal. (Does not work for relationships and features)

Reset Selection

  • Resets the pink-cornered selection


  • Un-does the last operation (Opening a database and exporting files cannot be undone)


  • Re-does the last un-done operation


  • Shows version, license and copyrights

Drawing Area

Diagrams are layouted automatically. You can influence the locations of classifiers only. When adding too many classifiers or relations, auto layouting may not achieve the expected results. In many cases, splitting the diagram into two or more diagrams solves the layouting issues and at the same time improves understandability by focusing on one aspect/topic per diagram.


  • To navigate to parent, sibling or children diagrams, click on the diagram.

  • To create a new diagram, click on the icon, or the smaller icon for a new child-diagram.

  • To restructure the diagram tree, drag a diagram name to the new location.


  • To select the diagram or a classifier or a feature or a relationship with yellow corners, click on this object.

  • To mark an element with pink corners, click on these objects twice.

  • To move classifiers within the diagram, 1.) press, 2.) drag and 3.) release the mouse button.


  1. To create a classifier, click at an empty space in the diagram.

  2. To create a child classifier, click into the white space of a classifier. (Alternatively, create a classifier (see 1) and a containment relationship (see 4).)

  3. To create a feature, click onto a classifier (name or border).

  4. To create a relationship, press on the source classifier and drag it to the destination classifier.

Element Configuration Area

Edit the properties of the yellow-cornered object.

  • name of the focused object

  • stereotype/valuetype of the focused object (deactivated depending on object-type)

  • type of the focused object

  • description of the focused object


  • Stores the latest changes to the database immediately. This feature is optional, it is not necessary to explicitly save the file.

Notification Bar


  • Informs on success of an operation, e.g. an export


  • Informs on a possible problem


  • Informs on an error