It opens the top page of Help.
It shows the version or the copyright of Metasequoia.
It shows the information on Plug-ins and installs the new Plug-ins.
It shows the error message in case the illegal Plug-ins is read or some error occures.
It measures the number of drawing sheets per second.
It can confirm which set-up makes the faster view. As the measuring is not so accurate, it is not so effective to use for the comparison with that of other hardware.
It shows the maker's homepage by linking to Internet.
It inputs serial ID and password necessary for removing restrictions on operation.