You can split the top page of an existing site into two or more
vertically or horizontally aligned sections. When the page is split, a frame
setting page is created, and a new top page appears.
To split a frame:
Open the top page (index.htm, for example).
Click Frame > Split
Frame > Specify and Split on
the menu bar.
In the Number field, you can specify the
number of frames to be created from the top page. Then, select one of the
radio buttons to determine the direction of the split.
Click OK.
Select how you treat the current top page. Click OK.
The new frames are reflected in Page Designer.