Download and execute installation file (For example, AxAssist1.14.0_for_DAX30_setup.exe).
Import AxAssist.xpo (Axapta 3.0) or PrivateProject_AxAssist.xpo (DAX4.0 or DAX2009) file to your Microsoft Dynamics AX installation (you can find it in installation folder).
Change class EditorScripts as shown below:
Microsoft Dynamics Axapta 3.0:
Add this code after variable definition section in Classes->EditorScripts->ShowScript() method: