I want to place UI widgets (e.g., icons, buttons) on LVGL's layer_top and layer_sys layers.

I'm a beginner, and I currently want to add some widgets—such as a battery icon, Wi-Fi icon, a pop-up keyboard, and common switches/buttons that appear on every page—to the layer_top and layer_sys layers in LVGL. I'd like to program this directly using EEZ Studio, but I haven't found a way to do it.