Perseid Modeler – User interface

  1. Projects
  2. Panels
  3. Settings & Themes
  4. Diagram types
  5. Display modes
  6. Shortcuts & Navigation

1. Projects

Saved projects are displayed on the Projects page. From this window, you can create new projects, open projects from a file and import JSON schema or OpenAPI structures. You can easily search the list of projects.

List of projects in Perseid Modeler

Tip: Details of the active project are shown in the footer.

2. Panels

There are two side panels in Perseid Modeler. On the left is the list of objects, on the right, you can edit the properties of the project, diagram or selected object, view a list of nested objects or preview generated script. You can use CTRL+SHIFT+P key combination to show or hide the panels.

Panels in Perseid Modeler

3. Settings & Themes

On the Settings page you can change the theme to Dark or Light, set the number of UNDO steps, where to display tabs with diagrams, configure proxy and specify other options.

Settings in Perseid Modeler

4. Diagram types

Each project automatically has two diagrams that you can switch between. In the tree diagram there is a fixed structure of objects. In the ERD-like diagram, you can rearrange subschemas and add labels, images, lines and so on.

Tree diagram

Tree diagram - json schema

ERD-like diagram

ER diagram - json schema

5. Display modes

By default, Moon Modeler displays descriptions, specifications and locally referenced objects on the tree diagram. To switch the display, click the Display button and select the desired mode.

Minimum information displayed

Basic structure with minimum information.

Display descriptions

When this mode is active, descriptions will be displayed directly in the diagram. You can recognize the text by its green color.


Display specifications

When you turn on this mode, the specification is displayed in the diagram. Each property name is yellow in the Dark theme and property values are shown in white.

Descriptions and specifications

Display locally referenced

If this mode is not active, and there is a reference to a subschema in the JSON schema, the subschema structure is not displayed after the node. The detail of the subchema is only visible in the diagram below.

Display locally referenced subschemas turned off.

However, if this mode is enabled, the subchema structure is visible directly after the node and the subchema elements can be manipulated directly.

Display locally referenced subschemas turned on.

6. Shortcuts & Navigation

Move from one node to another by pressing left, right, up or down arrow keys.

SHIFT+arrow key expands or collapses the nearest node and preserves the state of other nested nodes without modifications.

CTRL+arrow expands or collapses all nested nodes.


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