Splitting a frame will add a frame to your page.

You can add a frame to your page in 2 ways. 

1. Split a frame (will be explained below or see Video on how to do this)

2. Add a topmost, Sidemost, or Bottomost frame.  You can do this by clicking the option for that on the content toolbar.(click here to see a video on adding these frames) Click here to see where on the Content toolbar those options are located.

To split a frame click on the frame you wish to split, then determine if you want it split horizontally or Vertically.

See screenshot for how to split a frame Vertically:

The above Screenshot will add a new frame to the right of the selected frame with the pinterest button in it.

See below for how to split the frame Horizontally:

This will add a new empty frame above the selected frame with Pinterest button in it.