d在前面板建立一个量表控件，将其指针颜色设为绿色，主刻度颜色设为红色，标记文本颜色设为蓝色，并将主刻度设为反转。-d on the front panel to create a scale control to set the pointer to the color green, the main scale color to red, marking the text color to blue, and the main scale to reverse.