Automatic Renumber automatically renumbers already existing tags.
1. Click on the Automatic Renumber tool.
2. A dialog box will ask for the details of the new numbering.
Enter a starting value.
Select tag symbols.
Choose whether to select one element (to tag all) or select two elements (where you will need to select the first and last element in a chain and the tool will renumber all elements in between the selected).
As soon as you make your selections in the View area the new numbering will be applied automatically.
When you are happy with your settings click Apply.