For the moment you can only use LVGL’s built-in theme/style engine but meanwhile we’re working on a solution in SLS for global colours too, realization is planned for SLS-v1.3.5 release.
Thanks for your response, but it means we cannot use the WYSIWYG aspects of SLS, which is exactly the reason why we use it: to see the result, live.
I’ll have to define the theme myself and apply it in code, and flash the device to see it in action, even for paddings, borders, and so…
There’s progress in the direction of theme support, we worked out a complete solution in LVGL source, but implementing the WYSIWYG live-editing for the feature in SquareLine Studio GUI takes some more effort. You’ll see the most useful part/phase of it realized soon…