On the Image editor tab, there is the Zoom navigator panel that allows you to zoom a photo in and out, which is helpful when you do editing and need to take a closer look at some details. To begin, the user needs to toggle the slider on the panel and see the image zoom in or out in the Current image window.
You can also select the area to zoom in with the mouse. To keep the aspect ratio of the selection frame the same, the user can switch on the Lock mode.
The user can do this by clicking the Lock button - 
Once the Lock mode is enabled, the user can move the locked selection frame over the screen in the Zoom navigator and examine different areas of the image.
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