I tried to customize Wanderlust's summary buffer by changing
wl-summary-line-format. I would like to see the age of a message in the summary buffer. But I can not find any abbreviation for the age of a message.
In Gnus it was possible to define a
gnus-user-format-function-x, which could be referenced in the
gnus-summary-line-format. But I can not find anything similar in Wanderlust.
How to show the age of a message in the summary buffer?