Depending on what it is you want to achieve, there are two methods.
1. Use EDIT 006 to add 'gaps' into the string - it will still be one string, but will look like more than one. (Insert discontinuities)
2. Use EDIT 008 to create new strings from the sections of the existing string that you need, and then delete the original string (if required). (Create string from part of a string)
Read the help file for the various option available for EDIT 006 and 008.
1. Use EDIT 006 to add 'gaps' into the string - it will still be one string, but will look like more than one. (Insert discontinuities)
2. Use EDIT 008 to create new strings from the sections of the existing string that you need, and then delete the original string (if required). (Create string from part of a string)
Read the help file for the various option available for EDIT 006 and 008.