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: