4. The system of claim 3 , further comprising, in response to the receiving the newer message content, transitioning the older message content from the first device display area to the second device display area to facilitate displaying the newer message content in the first device display area.
3. The system of claim 2 , wherein the determining the second layout is performed in response to receiving newer message content newer than the older message content, and wherein the selectable ratio results in a corresponding minimum number of rows of text that are displayed in conjunction with the message element at the second token value.