Convert symbol disply

How-to
14

This does it:

    lv_obj_t* src   = lv_disp_get_scr_act (NULL);
    lv_obj_t* label = lv_label_create (src, NULL);

    lv_label_set_text                 (label, "Hello again");
    lv_obj_align                      (label, NULL, LV_ALIGN_CENTER, 0, 0);
    lv_obj_set_style_local_bg_color   (label, LV_LABEL_PART_MAIN, LV_STATE_DEFAULT, LV_COLOR_RED);
    lv_obj_set_style_local_bg_opa     (label, LV_LABEL_PART_MAIN, LV_STATE_DEFAULT, LV_OPA_COVER);