求翻译：按压F1键重新回到起始状态，采样起始点对应屏幕中心垂直线；按压F2键进入保存，保存当前屏幕显示内容；按压F3键进入光标测量；按压F4键返回单次测量页面。是什么意思？

Press F1 to return to the starting state, sample start point corresponds to the center of the screen vertical lines; press the F2 key to enter the save, save the current screen display; press the F3 key to enter the cursor measurements; press the F4 key to return a single survey page.

acupoints 1 F type back to initial State with a sampling point F acupoints corresponding screen Center; vertical line 2 button to enter Save to save the current screen display content; squeezing F 3 button to enter cursor measurements; squeezing F 4 type back to the single survey page.

Holds back the F1 key to return the initial state, the sampling outset point correspondence screen center perpendicular line; Holds back the F2 key to enter the preservation, preserves the current screen demonstration content; Holds back the F3 key to enter the cursor survey; Holds back the F4 key t

Press F1 to return to the starting state, sample start point corresponds to the center of the screen vertical lines; press the F2 key to enter the save, save the current screen display; press the F3 key to enter the cursor measurements; press the F4 key to return a single survey page.

Press F1 to return to the starting state, sample start point corresponds to the center of the screen vertical lines; press the F2 key to enter the save, save the current screen display; press the F3 key to enter the cursor measurements; press the F4 key to return a single survey page.