建议加入中文，英文，日文和其他主流语言的语言包

I'd like to design a new diagram starting from an existing one, without changing it. It should be possible to clone or "duplicate" a diagram

Add Collaboration Diagram from Sequence Diagram

There could be an easier way to move around the diagram, for example when pressing a key the   The mouse would become a "hand" that would he

Allowing to change seq to OPT in the selected Combined Fragment

When I'm writing sequence diagrams, the editor adds a frame into the view automatically. However, I always end up deleting this frame since it prevents me from performing box selections of the sub-elements.

Dragging in the body of a frame should not cause the frame to start dragging, but instead should initiate a box selection.

If I click on "not navigable" the navigability arrow appears, and vice versa.

We can change the diagram background color, but not the editor's background color. So, it would be perfect to add this feature.

It would be great if there was an extension for Dart as well.

The interface looses its color when a relation is added or it can not add a color to interface when some relation exist.

When adding events and guards to statecharts using the inline textbox, the event component does not seem to appear in the edit section for the transitions. Also editting in the inline textbox for transitions usually fails ( eg guard not removed). The event-guard-effect interface needs to be simplified and less buggy.

any chance to have starUML on iPad?

Currently it is not possible to successfully select a template parameter as the 'actual' of a template parameter substitution from the 'Select type' list, as doing so results in the error

Selected element (?) is not an instance of a UMLClassifier.

However it is possible to create a reference to a template parameter by entering the parameter name in the actual's input field and selecting the desired parameter from the suggestion list. However this become very cumbersome.

A reference is important because it allows changes to the actual's reference to propagate automatically e.g. renaming the source template parameter.

The activity diagrams become exceptionally large when we are unable to have line wrapping (or multi-line support) in the names of the bubbles. As a result, the bubbles can become greatly broad and squat, hindering readability. See the following link for an example:
https://photos.google.com/search/tra/photo/AF1QipPmAIDbVJeYNJvgYpVp6LZKNtlWfw_ySZ2AexM8

no icon for windows in ubuntu 18, you can try to install staruml on ubuntu 18, open a window ,you can see it

Bigger Canvas for ER-Model and other diagram. I cannot move to the edge of the digram unless I zoom out a lot, but the edge objects become inaccessible if I use normal size(e.g. 80%).

Please add connector symbol to represent that the diagram should be connected with other (part of) diagram.