It can be helpful to have a compact overview of the categories in a todo file and the types of items it contains; the Todo package provides a tabular view of this information.
Typing this command (todo-show-categories-table) in Todo mode or Todo
Archive mode switches to a buffer displaying a table that gives an
overview of the categories in the current todo or archive file. This
buffer is in Todo Categories mode.
The table consists of a column containing the names of the categories in
the file, followed by columns containing counts of certain types of
items in each category. With todo files there are four count types: all
todo (i.e., not done) items, diary items (i.e., those todo items lacking
the todo-nondiary-marker, which hence can appear in the Fancy Diary
display), done (but not archived) items, and archived items. With
archive files all items are done, so the table only has a column for
this count. The final row of the table gives total item counts across
all categories in the file.
Aside from explicitly invoking F c to display the table of
categories, you can also arrange to have it displayed on the first
invocation of todo-show for a given file (i.e., either using
todo-show to initiate a Todo session, or calling it in Todo mode
to visit another todo file). To do this customize the option
todo-show-first.