For an entire year, Apple worked on a file system that was new however according to what Craig Federighi has said, they considered it to be the biggest thing every time a new emoji was added. This means that the emojis which are present i the iOS10 is said to be 3 times bigger.
Apart from that, there were also a few visual tricks that Apple had added which helped in transforming the iMessage into a platform that could be used by Third Party Apps. There are a lot of things that can be done on the new iMessage. The features that have come out, will give you a good idea of what you can expect when the iOS is officially released.
During the WWDC, the company had made an official announcement pertaining to the fact that in the iOS10, the emojis would be three times bigger. There is also a new tool that can be used as an emoji replacement for those who want to convert their keywords into emojis that are corresponding with what they say. In order to do so, all they need to do is go ahead and compose the message after which the emoji button has to be tapped. Once they have done that, then they can choose the emojis that correspond with the word that they have typed.
Along with that, you can also go ahead and grab the attention of the receiver with the help of the full screen visuals and bubble effect. Once the message has been typed, you have the option of selecting the kind of effect you would like to choose to go along with your message. There are some other fun features that are available which also included the invisible ink feature that can be used if you want to send a hidden photo or message.