5.69 How to work with groups in worksheet

From http://www.mapleprimes.com/questions/201092-How-To-Insert-New-Paragraph-On-Its-Own by Carl Love:

I use these special keystrokes constantly in my Maple worksheet typing: 
 
    Ctrl-J: Insert execution group below cursor. 
    Ctrl-K: Insert execution group above cursor. 
    Ctrl-T: Switch from executable code mode to text mode (for entering extended formatted comments). 
    Ctrl-M: Switch from text mode to executable code mode. 
    Shift-Enter (or Shift-Return): Begin a new line in the same execution group. 
    Func-3: Split execution group into two (at cursor). 
    Func-4: Join cursor execution group with execution group below.