Hi,
Usually the best place to find information such as this, is the HX Effects 3.80 Owners Manual.
https://line6.com/data/6/0a00051afdbe673ccc8bdcf2d/application/pdf/HX Effects 3.80 Owner's Manual - English .pdf
See page 12 - Editing Effects. When you have a delay selected you change the time from milliseconds to note divisions by pressing down on the first knob below the display screen. This is detailed in the “shortcut” panel on page 12.
Hope this helps/makes sense.