Mark strength

Marks are classified into two categories, "strong mark" and "weak mark". The same level mark can be overwritten. A strong mark can overwrite a weak mark.

When you put a mark, the following action is taken.

Strong marks :: `o' and `D'

If marks an unmarked message, display the next message. If overwrites, stay the current line.

Weak marks :: `*' and `@'

Stay the current line always.

Refer to See section Beginner course to know which direction the cursor moves after putting a strong mark.

You can exchange marks as follows:

`m@'

`*' -> `@' :: It is useful when you pick messages by `?' then pass them to "uumerge" with `M-t'.

`m*'

`@' -> `*'

`ms'

`@' <-> `*'

`md'

`*' -> `D' :: It is useful when you put `D' marks to messages picked by `?'.

`mo'

`*' -> `o' :: It is useful when you put `o' marks to messages picked by `?'.