This option will join two string together to form a single string.
Select the first string and then use the 'Join Strings' option on Strings menu. Now click on the start/end point of the second string. If you click on the end point of the second string, it is automatically reversed before being joined to the first string.
If you need to join to the start of the first string, press the 'Reverse' button to reverse the string and allow the join to the other end.
To Join multiple Strings in one go.
Select two or more strings and press the join button - it will automatically join selected segments using common points if possible. It will reverse a string to join by common points if necessary. If all strings are not joined, the strings will be joined end to end in the order they are encountered in the file