Click the itmes can add the Modules to the page window, and if you clear all the modules , please use click to add modules, do not use drag, this is because click can put the module into the proper position of the email page.
Drag the module imgs into the page window will add the modules, and you can sort and duplicate and delete ,even you can clear all modules in the page window, pls click the Operate the Moduls directly tab to see the guide.
if you Clear all the modules, please using click the module items to add modules, , this is because click can put the module into the proper position of the email page.