To add a dark look and feel to the GUI but also to the colorschemes used in the code, you can install one of the following certified extensions from the plugin directory which can be reached from Tools > Plugins > Available Plugins:
To add a dark look and feel to the GUI but also to the colorschemes used in the code, you can install one of the following certified extensions from the plugin directory which can be reached from Tools > Plugins > Available Plugins: