Use:
class AuthorAdmin(admin.ModelAdmin):
…
def my_function(self, obj) :
"""My Custom Title"""
…
my_function.short_description = 'This is the Column Name'
It’s buried in the admin docs. short_description, specifically, is barely mentioned under the discussion of list_display (more by example than actually called out). The other items like this are similiarly buried in the admin docs, but here’s a summary:
short_description: the column title to use (string)allow_tags: what the name says… let’s you use HTML (TrueorFalse)admin_order_field: a field on the model to order this column by (string, field name)boolean: indicates the return value is boolean and signals the admin to use the nice graphic green check/red X (TrueorFalse)