First of all, you should divide the objects you want to operate into a group (to prevent mistakes), then select this group and use the scaling command. When you move the mouse, the X-axis, Y-axis and Z-axis will turn yellow correspondingly. When xzy turns Huang Shi at the same time, it represents the three zooming directions. You can decide the size yourself, or right-click the zoom command to enter the zoom ratio.

Try more ~ ~ I hope it will help you ~