Viggen reference setting reversed

Viggen altitude reference setting reversed. Reference line on gauge looks like it is reversed.... when setting reference, or just floating with up/down, the reference line goes down when going up in altitude, goes up when aircraft goes down in altitude.. is that correct? shouldn't the line go up when aircraft climbs, and go down when aircraft loses altitude? I noticed this when setting my key for reference. Or, maybe there is an option to check a box to reverse this reference. I have to go back and look.