Add text juste replace the current one....

Hi all,

First sory for my english cause i'm french.

I've made a product with 1 text element. When i test the product i can edit the defaut text if i click on it, and i can add a new text if i clic on the "add text" button. But i can add more text, cause if i clic on add text on more time it just edit the first one i've added...

I precise that i don't use "replace..."

How can i do, for let my customers add more than one text ?

Thanks for your help !!