Creating a Length operation
The Length operation can be used to retrieve the number of characters in an attribute or text.
Steps:
Navigate to the operations tab in your template and then click the blue + button.
A pop up menu will appear on the right. Rename your operation to your desired name and click "Rename operation".
After you have done so, click the "Add" button to start creating a new operation. Then choose "Length".
Inside the length operation, click the "Add" button once more, you can then choose to add a "Attribute" or "Text".
If you have chosen "Text", then you can simply just add your text. However, if you have chosen "Attribute" you can either add an existing attribute or create your own within the operation.
Save the template and insert your newly created Length operation into your template or use it in other operations!