To go to the E-Card editing page, go to E-Cards > E-Cards from the menu on the left and click on the e-card you want to edit. Or you can click the Operations button on the right and click Edit in the menu that opens.

On the page that appears, you will find all the information of the relevant e-card. After making the changes you want, you can save your changes by clicking the Save button at the bottom of the page.