As explained in the Escaped Strings topic there are many situations in many programming languages where important characters cannot be used inside a declared string and Pipeline Runner is no different. For example, where a string is surrounded with double quotes, you cannot include any further double quotes inside the string or there would be an imbalance in the number of quotation marks. If you were to include two quotation marks inside a string that was already delimited with double quotes it would think that it was two strings and cause an error since only one string can be assigned to a string variable.
You can select this option to display the String Escaper Dialog which allows you to type or paste text into it (such as a file path and file name for example) and have the text automatically escaped using the simplest possible level of escaping. The resulting escaped string is automatically copied to the clipboard ready to be pasted into a Pipeline Runner script. To access it select Tools | Generate Command Line from the main menu.
Note: You can also escape text inline, using the Escape Selected Text option which is available from the Edit Menu.
See Also: Escaped Strings String Escaper Dialog Escape Selected Text