How to change a theme of existant project?

Is there a method to modify a theme that was initially selected for a project at a later stage? I am unable to locate a way to achieve this in SLS.

When I initially created the project, I chose the dark theme, but as I progressed in the project, I realized that I do not require this theme. Instead, I wish to revert to using the default theme, but I am uncertain if this is feasible.

Additionally, I am curious if it is possible to export specific portions of one project to another.

I appreciate your assistance in advance.


  • SquareLine Studio version: 1.3.2
  • Operating system: Windows 10
  • Target hardware:

Unfortunately, it is not possible to set a topic afterwards. All you can do is change this manually in the spj file.

  • If you want a simplified theme, you must set this:
    “theme_simplified”: true,
    “theme_dark”: false,

  • If you want a light theme, you need to set this:
    “theme_simplified”: false,
    “theme_dark”: false,

  • If you want a dark theme, you must set this:
    “theme_simplified”: false,
    “theme_dark”: true,