Whenever you upload an image or video you can set alt text within the editor via the field provided in the media window.

https://cdn.elev.io/file/uploads/p9jpW4cYPyd717Yrl8GDNdjJSSFuIbXFNYXBroJVATQ/isnsldmV1SVYdvPoTJkt4bpE0X3OruS8TIov8WUbXKQ/el-alt-text-t60.jpg


In many instances, you may set portrait and landscape alternates for media. Because these can differ in content, you can set different alt text for them too.

Read more about accessibility in Shorthand here.