I have a couple of lists which are primarily for private use. I do not want anonymous users to be able to select them. Is there any way to do this?
yes, but some custom coding needed using hook_form_alter(), or easier: with css
That seems a bit complex. I'm changing this to a feature request.
I'd also like to be able to create a newsletter from a template rather than updating the template and then sending it. That appears not to be the expected behaviour of a template.
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