The frameset replaces the BODY part of a normal webpage. The number and position of frames is set with the ROWS and COLS attributes. The size is specified in pixels or percentages separated by commas. An asterisk can be used to claim the remaining space. When the total specified size does not fit, the window will be compressed.
Frames normally have a margin to their borders.
Scroll bars will appear in pages larger than their frame. Links in one frame can address a page in another frame. There are reserved names for special purposes.