ZOOM primary command
The ZOOM primary command (in CHAR, HEX, and LHEX display formats), limits the display to just one segment, showing you all of the data in the segment without having to scroll left or right.
The ZOOM primary command (in SNGL and TABL display formats), zooming in shows all fields in the segment presented in SNGL display format, rather than only those fields selected by the view.
You can either ZOOM in on the current segment (the one at the top of the page) or you can place the cursor on the segment you want to ZOOM in on and press Enter.
To zoom back out to the display format that was current prior to zooming in, enter the ZOOM command again.