LVGL Editor, how to remove style & flag

I’m trying to recreate the loader with arc example in LVGL Editor, but I’m having a hard time with the lack of doc on the editor. I get to this part:

    lv_obj_remove_style(arc, NULL, LV_PART_KNOB);   /*Be sure the knob is not displayed*/
    lv_obj_remove_flag(arc, LV_OBJ_FLAG_CLICKABLE);  /*To not allow adjusting by click*/

and I get lost, how would I do this using the xml api?