gnus-mime-display-attachment-buttons-in-header

gnus-mime-display-attachment-buttons-in-header is a variable defined in `gnus-art.el'.
Its value is

t

Documentation:
Add attachment buttons in the end of the header of an article.
Since MIME attachments tend to be put at the end of an article, we may
overlook them if there is a huge body. This option offers you a copy
of all non-inlinable MIME parts as buttons shown in front of an article.
If nil, don't show those extra buttons.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 25.1 of Emacs.