To align diagram Elements, select the elements and click the respective button in the alignment toolbar:

Note that dockers of Connection elements are not influenced by aligning and you might need to remove them.

To change the element layering, select the required element or a group of elements and click the button in the Process Designer toolbar. Choose one of the following options:

Note that the connection elements are not influenced by the layering and remain always visible.

When moving an Element with incoming or outgoing Connection elements, dockers are automatically added to accommodate the appropriate Connection shape. To create a docker manually, click and pull the respective point of the Connection object. To delete a docker, click the Delete a Docker button in the toolbar and then click the respective Docker. Once you delete dockers of a Connection object, no more dockers will be created automatically.

To resize Elements on the canvas, select the element, and click and pull the blue arrow displayed in the upper left or lower right corner of the element.

To make the size of multiple elements identical, select the Elements and then click the icon in the toolbar and then click on Alignment Same Size: all Elements will be resized to the size of the largest selected Element.

Note that only Activity Elements can be resized.

To create and manage an element group:

When you lock process model elements, the elements cannot be edited or moved.

Color schemes define the colors used for individual process elements in a diagram.

Color schemes are stored in the themes.json file, which is located in the global directory of each repository.

To apply a new color scheme or any other defined scheme, click the button in the Process Designer toolbar and select one of the available color schemes from the drop-down menu.

Local history keeps track of any changes, you apply to your Process model so as to allow you to restore any previous status of the Process model. By default, this feature is turned off.

To turn on local history recording, click the Local History button and select Enable Local History entry. From this menu, you can also display the local history records and apply the respective status to the Process as well as disable the feature or clear the current local history log.

To change the size of the canvas, click the respective yellow arrow on the canvas edge.

Process validation can be set up to be continuous or to be only immediate.

To validate your Process model continuously, click the Validate ( ) button in the toolbar of the Process Designer with the Process and click Start Validating. If validation errors have been detected, the elements with errors are highlighted in orange. Click on the invalid element on the canvas to display a dialog with the summary of its validation errors. To disable continuous validation, click the Validate ( ) button in the toolbar of the Process Designer with the Process and click Stop Validating.

Also note that errors on the element properties are visualized in further details in the Properties view of the respective element.

If you want to display the validation errors and not to keep the validation feature activated, click the Validate ( ) button in the toolbar of the Process Designer with the Process and click View all issues.

Additionally after you save your Process, any validation errors are also displayed in the Messages view.

Figure 4.5. Stopping continuous validation

If your process is invalid and the Process Designer is unable to render it in the designer canvas, you can open the process in XML format and make the necessary corrections.