Here's how to compare two orthophotos:
Activate the Compare Orthophotos tool.
In the window that appears, you'll see the two most recent orthophotos from the timeline. Use the slider in the middle to determine how much of each orthophoto you want to see.
To zoom in or out of the orthophoto, use the scroll wheel on the mouse. Double-clicking in the image performs a stepwise zoom in. Similarly, if you hold down SHIFT and double-click, you get a stepwise zoom out.
To pan within the orthophoto, hold down the left mouse button and move the mouse in the direction you want to move.
If you want to change the orthophotos displayed on each side, you can switch orthophotos through the menu at the top of the window.
Please note that only orthophotos processed through Cloud Processing can be used in the Compare Orthophotos function.