There should be a way to set the default line style to orthogonal.

There is yet another way to model the software architecture with C4 models where C1 is a helicopter view and C4 is a class diagram zoom level (see more https://c4model.com/). Components used for C4 modelling are simple but have some notation rules.

Full screen mode for the workspace and separately for the workspace with instrument panels.

As an enterprise architect, I use ArchiMate for high level modelling and UML for more detailed modelling. It would be great if StarUML could add ArchiMate support!

Currently the decision tool/shape in activity diagrams has no label to type in to it. It’s essential it has one. Also, it would be great if this text wrapped nicely to the diamond shape that encloses it.

If you're behind a proxy server it is not possible to load Extensions.
Other solution: Manually installable packages.

In "Explorer" moving things to be sub items of diagrams seems to be a single item at a time experience (unless i missed anything.) Would save time to be able to control-click or shift-click to select multiple items in explorer to move.

There aren't a lot of good tools out there for web-based UML (UWE). Adding this feature would improve your market share

As in many other design software, you can also use the space bar. Please be extremely useful, it is an excellent user interface pattern.

In large seqence diagrams, we should be able to scroll down to the lower portion of the diagram. As of now in v2.8.0, we are unable to scroll down to the lower portion of the diagram, under zoomed in condition; and when we are zooming out just enough to see the lower portion, we are unable to view what we are working on, unless we use a microscope.

User would like to have the ability to add a generic type (example: LinkedList<String>) as return values from methods in classes in Class Diagrams. Currently, only primitive and class types are allowed.

Add Collaboration Diagram from Sequence Diagram

I suggest you add a Use Case Specification, so that inside a Use Case Diagram, you can add the specification for principal and alternate flow and pre/post conditions for each one of the use cases in the Use Case Diagram. It is indeed a very used feature, and is lacking on StarUML 2.

In order to be able to work professionally with TypeScript...

Allow the representation of generalization/specialization relationships in ERD diagrams

It would be great, if you can create special settings that will help to use program on Windows 8 tablets. Like larger icons, special gestures and so on...

Better model navigation inside: diagram to a other diagram

Situation:

Currently you can only navigate in the model explorer.
Model it self and documentation.
(OS Version)

Impact:

Currently is no intuitive and fast navigation from diagram to diagram possible.

Request:

Provide navigation inside diagrams to the main diagram of a Package.
Or using comment to add a link to a diagram.

Ability must be for the Model and the Documentation export.

Generate class diagram and Dependency diagram from existing project.