Thank you very much for sharing a valuable document.

But if I used your codes in other script, it doesn't work 

for example 

restart;

J:-dash(X);
 

If I wanted to use above code , I get Error ('J' does not evaluate to a module );

Is there any hidden background command in your document uploaded  in attachment?

@acer15623 , I think what I need is 1D Plaintext. As you said, sometimes errors occur because of using 2D input mode

Could you show me how can I use 1D ? 

Thank you 

Thank you for replying 

Yes. I know this page and it is  very helpful for using shortkey.But still cumbersome  .

For example if you use a variable X with an over- and subscript. you should use overscript by using CTRL + O  and than you need to bring cursor to the inital postion than you should use subscript 

Sometimes you can forget the order of this sequence which is important I think (in this case first overscript then subscript) But it may happen by programming to use first subscript then overscript. This is an ambiguity.