You can comment or uncomment a line of text by selecting the line or highlighting the text and using the Comment and Uncomment functions. These two functions use the single line comment delimiter "- -".
Commenting out a line means that the line is ignored during execution.
To comment a line of text
Select the text or place the cursor on the line to be commented and click Comment . Notice that the beginning of a text or line prefix is marked with the " - - " delimiter.
To uncomment a line of text
Select the text or place the cursor on the line to be uncommented and click Uncomment . Notice the first occurrence of the " - - " comment delimiter is removed.