I create new service account to use Google API and Oauth 2.0 in my web app. I need to add these scopes in Google Console:
In old version of Google Console I had "Add scope" button, but I can't find it in new version of https://console.developers.google.com/
Inorder to add new scopes scroll up in the same page as shown in your image, then you can see the option "edit app".
Once you click it you will be presented with a screen like the following image shown below.
Since you wanted to add new scope just ignore the first page (i mean: scroll down, save and continue) in the second page you can manage your scopes using the "add or remove scope" option.