nextcloud-server/files/templates/admin.php

<form>
	<input type="checkbox" /> Allow public folders<br>

	(if public is enabled)<br>
		<input type="radio" name="sharingaim" checked="checked" /> separated from webdav storage<br>
		<input type="radio" name="sharingaim" /> let the user decide<br>
		<input type="radio" name="sharingaim" /> folder "/public" in webdav storage<br>
	(endif)<br>

	<input type="checkbox" /> Allow downloading shared files<br>
	<input type="checkbox" /> Allow uploading in shared directory<br>
</form>