Working sentence highlight

It would be cool if the software could help you focus in the current sencence you are writting, by highlighting it automatically, or bolding it. While you are writing, the sentence is bold, and once you hit period, the sentence goes back to normal.
Sorry for my bad English. :slight_smile:

What happens if the current sentence was bolded before it became current?

In the Mac version a solution would be to change the shape of the cursor from | to ∎