Hello @VelmaL81 ,
Safari is a compatible browser for our site, however some functionalities of our website simply aren't going to work ideally on the mobile versions of these browsers.
If you're using a mobile device like an iPad or iPhone, I'd strongly recommend using the mobile app. Not all functionalities of the website are going to work as intended on mobile device setups, including the email builder.
See also:
Managing your library using the mobile app
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