Select ALT texts from the menu bar at the top. With TinyIMG you can optimize Product, Collection and Article pages. Then choose one of them and click “View”. If you select a product page with a filter selection, you can select "All" or "With errors" .Then is the status bar you will see how many errors your product page has. And near it - "Edit" button. When you click on it you will see all of the images and ALT texts. Here you could change them. When you do it, click "Update". And if you select Collection or Article page, you'll immediately see all the ALT texts you can edit ( with a filter selection, you can select "All" or "With errors").