The process allows you to copy day book lines. You might want to do so, for example, for recurring journal lines, such as for the monthly distribution of rental costs.
If you click the button, a wizard opens allowing you to specify the day book and the page from which you want to copy the lines. You can change the posting date of the copied line, make contra entries for amounts, and delete your current day book lines.
You can also change the line descriptions. If the line has a month designation, you could, for example, enter 'January rent' in the Find field, and 'February rent' in the Change into field.
Click Next to preview the lines. Check the lines, and go back to the previous form to make changes, if necessary. If you are happy with the lines, click Finish.