A tab to add channel comments, which will be saved in the XCM or XCL text file, and visible in specific Layouts. When adding comments in the color of the channel, there are not automatically visible in layouts.
You need a field in a layout to see the value (see attached sample):
<TITLE STRING="Diseño de comentarios" > <BODY ANCHO= "130" HEIGHT="65" <FIELD NAME="Comentarios" CAPTION="Comentarios" TOP="0" LEFT="1" ANCHO= "100" ALTURA="15" FONT_NAME="Ginebra" FONT_SIZE="12"> >