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

Enable 8-digit HTML color codes such as #FFFFFF00 so that elements such as classes and shapes can be transparent. Currently, if more than 6 digits are typed, the app just truncates the value.

I can't create well-formed notes for nodes description because all text in the note fill one single line without lines breaking.
It will be fine to provide any hot keys for this purpose to style text.

I am working on a robustness diagram I would like the text form the use case displayed on the diagram so that if i make changes the documentation is synchronized with it. Hence if i could place a note component and the diagram and link it to the use case so that it shows the documentation. Also if i make changes in the note component the Documentation of the Use Case gets updated as well.

Allowing to change seq to OPT in the selected Combined Fragment

any chance to have starUML on iPad?

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.

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.

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.

I use many Diagramms and arrange them on the left handside "Working Diagrams". After closing and re-opening the file, the order of the "Working Diagrams" is set to the order you opened the diagrams, and not the one you had on arranging them manually. I would like to have the order of them persisted (should not be a big deal, shouldn't it?).

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

Create the ability to align text in relation to the element to which it belongs. For example: Top Left, Bottom Right, Middle Center.

Vertical Alignment should offer: Top, Middle, Bottom
Horizontal Alignment should offer: Left, Center, Right, Justified

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