The Alignment Override mini-calendar modifiers specify, for a given mini-calendar, what the flow of dates alignment should be, independently of how it is set in the flow of dates mini-calendar options.
There are 4 distinct alignment override modifiers:
:alT :alB :alL :alR
which correspond to setting the flow of dates alignment to top, bottom, left and right, respectively.

If you use an alignment override setting that is impossible (such as bottom aligning a vertical mini-calendar), then a warning message may not be issued during diary generation, and it is up to you to identify and correct the issue.
See also: vertical override, horizontal override and other mini-calendar modifiers.
Topic 178260, last updated on 23-Jun-2020