What mudder says, but figured I'd try to simplify/reword and use what I believe are 'official' terminologies...
The FCD ("fuel consumption display") button allows you to toggle between the trip "segment" display and one of the 3 "trip" displays (A, B, and lifetime). The segment display has arrows at the ends of the little bars or something like that. In segment mode, you can press and hold FCD button to reset. In trip mode, you use the trip button to choose which among A, B, or lifetime you want displayed. You press and hold trip to reset.
I usually use segment for single day usage, reset at the beginning of each day, which is essentially each trip. I usually only use one of the Trip modes, like A, and reset from tank to tank, rarely B. And I check into lifetime now and again... The segment display is what I usually have displayed, the meat and potatoes. But I'll toggle over to Trip A to check how many miles I've gone on the current tank, to gauge how much farther I can go until I've got to refill. I'll look at the average MPG value and multiply by 10, and compare the result to total miles driven since last refill, that result minus total miles driven since last refill is about how far I can go...
Pro tip 2: you can press and hold FCD when in trip mode (only when stopped or before trips or something like that) to page through the elements in the display that are or are not displayed. For example, you can remove the instantaneous fuel economy bars from the display that shows total, average, and bars, so only the total and average remain.
The FCD ("fuel consumption display") button allows you to toggle between the trip "segment" display and one of the 3 "trip" displays (A, B, and lifetime). The segment display has arrows at the ends of the little bars or something like that. In segment mode, you can press and hold FCD button to reset. In trip mode, you use the trip button to choose which among A, B, or lifetime you want displayed. You press and hold trip to reset.
I usually use segment for single day usage, reset at the beginning of each day, which is essentially each trip. I usually only use one of the Trip modes, like A, and reset from tank to tank, rarely B. And I check into lifetime now and again... The segment display is what I usually have displayed, the meat and potatoes. But I'll toggle over to Trip A to check how many miles I've gone on the current tank, to gauge how much farther I can go until I've got to refill. I'll look at the average MPG value and multiply by 10, and compare the result to total miles driven since last refill, that result minus total miles driven since last refill is about how far I can go...
Pro tip 2: you can press and hold FCD when in trip mode (only when stopped or before trips or something like that) to page through the elements in the display that are or are not displayed. For example, you can remove the instantaneous fuel economy bars from the display that shows total, average, and bars, so only the total and average remain.
