Disto models with integrated digital Pointfinder in the device has 1x, 2x and 4x zoom.
D5 & D8
You can see on the left up corner which zoom level you have selected. To change from one zoom level to the next one you have to press the “Digital Pointfinder” key.
E7500i
You can see in the middle of the status bar of the screen, which zoom level you have selected. To change from one zoom level to the next one you have to press the “up/down arrow keys”.