The C/AL Editor in the Microsoft Dynamics NAV Development Environment has been redesigned to give you more coding capabilities.
Coding in the new C/AL editor is like before except you benefit from new features such as IntelliSense, name completion, change tracking, improved syntax highlighting and colorization.
The new design has a look-and-feel that resembles the Debugger regarding breakpoints.
And here it is
And if you start typing then it will start IntelliSense and you can press tab/enter to name completion.
Does it mean we cannot use old editor?
No, we can use the old version of the C/AL Editor by running the Microsoft Dynamics NAV Development Environment from a command prompt and setting the useoldeditor parameter
Ex: run the command prompt and add below string and enter
"C:\Program Files (x86)\Microsoft Dynamics NAV\90\RoleTailored Client\finsql.exe" useoldeditor=Yes
Or you can create a shortcut of the finsql and add useoldeditor=Yes in properties