The Append Line Editor

Using The Line Editor Append should be used as the primary way to add a new line.   It only uses 2 values and gives you the most viewing area.   Entering a line number and clicking Submit will copy that line and append it as a new line.   If you enter a line number, an increment value, and click the Submit button, that line will be copied and appended, then the "Line Number:" value will be incremented by the "Then increment by:" value.

Example