From FreeCAD Documentation
    This page is a translated version of the page Property editor and the translation is 53% complete.


    Der Eigenschafteneditor erscheint wenn der Reiter Modell der Combo-Ansicht auf der Oberfläche aktiv ist; er ermöglicht die Verwaltung der öffentlich zugänglichen Eigenschaften der Objekte im Dokument.

    Generell ist der Eigenschafteneditor dazu gedacht, nur ein Objekt zur Zeit zu behandeln. Die im Eigenschafteneditor angezeigten Werte gehören zum ausgewählten Objekt des aktiven Dokuments. Es gibt jedoch einige Eigenschaften, wie Farben, die für viele ausgewählte Objekte gleichzeitig gesetzt werden können. Wenn kein Element ausgewählt wurde, bleibt der Eigenschafteneditor leer.

    Nicht alle Eigenschaften können immer geändert werden; je nach dem spezifischen Status der Eigenschaft sind einige von ihnen unsichtbar (nicht aufgeführt) oder schreibgeschützt (nicht bearbeitbar).

    FreeCAD Property editor empty.png

    Leerer Eigenschafteneditor, wenn kein Objekt ausgewählt ist.


    Eine Eigenschaft ist eine Information wie eine Zahl oder eine Textzeichenfolge, die an ein FreeCAD-Dokument oder ein Objekt im Dokument angehängt ist.

    Benutzerdefinierte skriptgenerierte Objekte können jeden der im Basissystem definierten Eigenschaftstypen verwenden. Die vollständige Liste findet man unter Objekteigenschaften.

    Einige der am häufigsten verwendeten Eigenschaftstypen sind:


    Verschiedene Objekte können unterschiedliche Typen von Eigenschaften haben. Viele Objekte haben jedoch die gleichen Typen, weil sie von der gleichen internen Klasse abgeleitet sind. Zum Beispiel haben die meisten Objekte, die geometrische Formen beschreiben (Linien, Kreise, Rechtecke, Volumenkörper, importierte Teile usw.), die Eigenschaft "Platzierung", die ihre Position in der 3D-Ansicht definiert.

    Ansicht- und Daten-Eigenschaften

    There are two classes of feature properties accessible through tabs in the property editor:

    • View properties, related to the "visual" appearance of the object. The View properties are tied to the ViewProvider (ViewObject attribute) of the object, and are only accessible when the graphical user interface (GUI) is loaded. They are not accessible when using FreeCAD in console mode, or as a headless library.
    • Data properties, related to the "physical" parameters of the object. The Data properties define the essential characteristics of the object; they exist at all times, even when FreeCAD is used in console mode, or as a library. This means that if you load a document in console mode, you can edit the radius of a circle or the length of a line, even if you cannot see the result on the screen.

    For this reason, Data properties are considered to be more "real", as they truly define the geometry of a shape. On the other hand, View properties are less important because they only affect the superficial appearance of the geometry. For example, a circle of 10 mm radius is different from a circle of 5 mm radius; the color of the circle (view property) doesn't affect its shape, but the radius does (data property). In many instances in this documentation, the word "property" is understood to refer to a "Data property" and not to a "View property".

    Grundlegende Eigenschaften

    Siehe auch: Objektname

    The most basic scripted object won't show any Data property in the property editor, except for its Label attribute. The Label is a user editable string that identifies the object in the tree view. On the other hand, the Name attribute of an object is assigned at the moment of its creation and cannot be changed; this attribute is read-only, and is not displayed in the property editor either.

    Ein grundlegendes parametrisches Objekt wird wie folgt erstellt

    obj = App.ActiveDocument.addObject("App::FeaturePython", "App__FeaturePython")
    obj.Label = "Plain_object"

    FreeCAD Property editor View basic.png FreeCAD Property editor Data basic.png

    View and Data tabs of the property editor, for a basic "App::FeaturePython" scripted object.

    Most geometrical objects that can be created and displayed in the 3D view are derived from a Part::Feature. See Part Feature for the most basic properties that these objects have.

    For 2D geometry, most objects are derived from Part::Part2DObject (itself derived from Part::Feature) which is the base of Sketches, and most Draft elements. See Part Part2DObject for the most basic properties that these objects have.


    Right clicking in an empty space of the view, or with a property selected, shows only one command:

    • Show all: if active, in addition to the standard properties that appear already, it shows all the hidden Data and View properties in their respective tabs.
      • Data: "Proxy", "Label2", "Expression Engine", and "Visibility".
      • View: "Proxy".

    When the Show all option is active, and one property is selected, more actions are available with a second right click:

    • Show all: deactivates the Show all command, hiding the additional Data and View properties.
    • Add Property: adds a dynamic property to the object; this works with both C++ defined objects, and Python scripted objects.
    • Expression...: brings up the formula editor, which allows using expressions in the property value.
    • Hidden: if active, sets the property as hidden, meaning that it will only be displayed in the property editor if Show all is active.
    • Output: if active, sets the property as output.
    • NoRecompute: if active, sets the property as not recomputed when the document is recomputed; this is useful when a property should be kept unaffected by other updates.
    • ReadOnly: if active, sets the property to be read-only; it won't be editable in the property editor any more until this switch is turned off. The Expression... menu entry is no longer available. Note: It may be still possible to change the property via a dialog that updates the property.
    • Transient: if active, sets the property as transient. The value of a transient property is not saved to file. When opening a file, it is instantiated with its default value.
    • Touched: if active, it becomes touched, and ready for recompute.
    • EvalOnRestore: if active, it is evaluated when the document is restored.

    Beispiel für die Eigenschaften eines PartDesign-Objekts

    In this section we show some common properties that are visible for a PartDesign Body, and one PartDesign Feature. The specific properties of an object can found in the specific documentation page of that object.


    Most of these properties are inherited from the Part Feature basic object.

    FreeCAD Property editor View.png


    • AnsichtAngular Deflection: it is another way to specify how finely to generate the mesh for rendering on screen or when exporting. The default value is 28.5 degrees, or 0.5 radians. The smaller the value the smoother the appearance will be in the 3D view, and the finer the mesh that will be exported.
    • AnsichtBounding Box: indicates if a box showing the overall extent of the object is displayed.
    • AnsichtDeviation: sets the accuracy of the polygonal representation of the model in the 3D view (tessellation). Lower values indicate better quality. The value is in percent of object's size.
    • AnsichtDisplay Mode: display mode of the entire Body, Flat lines (default), Shaded, Wireframe, Points.
    • AnsichtDisplay Mode Body: display mode of the Tip of the Body, Through (default), Tip.
    • AnsichtDraw Style: Solid, Dashed, Dotted, Dashdot; defines the style of the edges in the 3D view.
    • AnsichtLighting: One side, Two side (default).
    • AnsichtLine Color: the RGB color of the edges, it defaults to (25, 25, 25).
    • AnsichtLine Width: the thickness of the edges, it defaults to 2 pixels.
    • AnsichtOn Top When Selected: Disabled, Enabled, Object, Element.
    • AnsichtPoint Color: the RGB color of the vertices, it defaults to (25, 25, 25).
    • AnsichtPoint Size: the size of the vertices, it defaults to 2 pixels.
    • AnsichtSelectable: whether the object is selectable or not.
    • AnsichtSelection Style: Shape, BoundBox.
    • AnsichtShape Color: the RGB color of the shape, it defaults to (204, 204, 204).
    • AnsichtShow In Tree: if it is true, the object appears in the tree view. Otherwise, it is set as invisible.
    • AnsichtTransparency: the degree of transparency from 0 (default) to 100.
    • AnsichtVisibility: whether the object is visible in the 3D view or not. Toggle with the Space bar in the keyboard.


    In this case we observe the properties of the PartDesign Revolution feature.

    FreeCAD Property editor Data.png


    • DatenLabel: the user defined name given to the object, this can be changed as desired.

    Part Design

    • DatenRefine: whether to refine the fusion done with other objects.


    • DatenBase: the point in space that specifies where the revolution takes place. It cannot be modified directly, only when editing the feature.
    • DatenAxis: the axis around which the revolution will be performed. It cannot be modified directly, only when editing the feature.
    • DatenAngle: the angle that specifies how much of the base element is rotated. By default it is 360 deg, but it can be any fraction of that.

    Sketch Based

    • DatenMidplane: if the base object is a Sketch, when this property is true, it will perform the revolution with the sketch serving as a plane of symmetry. This is noticeable if the DatenAngle is different from 360 deg.
    • DatenReversed: by default it is true. Whether to perform the revolution in one direction or the other.


    Siehe auch: FreeCAD Grundlagen Skripten.

    Siehe geskriptete Objekte für die vollständigen Informationen zum Hinzufügen von Eigenschaften zu Objekten, die über Python definiert wurden. Deine Übersetzung

    Most properties that are visible in the property editor can be accessed from the Python console. These properties are just attributes of the class that defines the selected object. For example, if the property editor shows the DatenGroup property, this means that the object has the Group attribute.


    These attributes (properties) are added with the addProperty method of the base object. At least it is necessary to specify the type of property, and its name.

    obj.addProperty("App::PropertyFloat", "Custom")

    Properties follow the CapitalCamelCase or PascalCase convention, meaning that each word starts with a capital letter, and there are no underscores. When the property editor displays such names, it leaves a space between each capital letter, making it easier to read.

    obj.addProperty("App::PropertyDistance", "CustomCamelProperty")
    obj.CustomCamelProperty = 1000

    FreeCAD Property editor Custom.png

    Property editor showing the Data properties of a PartDesign Body, with two additional properties, "Custom" and "Custom Camel Property".

    In similar way the View properties are added, not to the base object, but to its ViewObject. Then, it follows that properties like AnsichtAngular Deflection, AnsichtBounding Box, AnsichtDisplay Mode, AnsichtDisplay Mode Body, AnsichtLine Color, and others, can be examined and changed from the Python console.


    Alle öffentlichen Eigenschaften des Objekts und seines Ansichtsanbieters sind in dem entsprechenden Attribut PropertiesList enthalten.