This section describes [TOC], [My TOC], and [History] tabs on the top of the contents area.
Click to hide the contents area and widen the content area. Click
to shrink the content area and widen the contents area.
This section describes the [TOC] tab in the contents area.
This section describes the [My TOC] tab in which you can register topics you often want to read.
This section describes the [History] tab on which the browsing history is displayed,