The biggest differences between the first and second developer previews of Android N mostly come down to bugs, API changes, and other under - the - hood refinements. (androidauthority.com)
This is the second developer preview (DP2) to be made available and these images allow owners of a compatible smartphone to install the latest version of Android on their device. (androidheadlines.com)
The newly added menu that's available as of the second developer preview of Android O contains a «Change icon shape» option on the main Settings screen that's located near the bottom of the interface, immediately above the «About» section. (androidheadlines.com)