Finally understand how this aspect of Audirvana works.
In Library view, the display option of Tracks Albums Artists on top of screen have pre-defined sort orders. Tracks and Artists sort orders cannot be altered in Library view, but you have to go to Settings (gear symbol top right), then go to Sort Criteria to select how the Library is displayed. Artists has a pull-down menu to select sort order.
This is exceedingly confusing. Why not have pull down list for sort order for Tracks and Albums as well, like for Artists? Maybe have a “custom” option for more complicated sort schemes defined in Settings-Sort Criteria. But for most people and circumstances, a single factor sort is sufficient, but easy switch in Library view from say alphabetical by artist to by date would be much better. my 2c.