If you have not activated the Table Transfer module you can activate the module quickly from your Back Office. 

If you will access your Back Office from your iPad, you simply go to Settings ⚙️> BackOffice, in the case you will access with your computer, open your browser and type: https://app.tillersystems.com/ 

On your Back Office click on Configuration > Your modules

Select > Order taking settings and activate the Table transfer by clicking on the the red circle to the right of the module. 

You have now activated the Table Transfer module. 

On your iPad, if you have to transfer a product simply click on the round arrow on the upper right corner of the ordering page. Then, click on Transfer Products 

Select the products you wish to transfer by clicking on the blue circle on the left side of the product name. Subsequently, click on Transfer. 

Now select the table you wish to transfer the products simply by clicking on the Table name. Finally click on Transfer to [table name]. 

And it's done!