I always wondered why the ‘Display’ tab containing the ‘select content item as default view’ was sometimes clickable and sometimes not. Well the answer is simple (it always is after you’ve found it): if you have an item in your folder called index_html, Plone will automatically recognise that as the default view item, and you have to rename it before you can access the ‘Display’ tab….
This also goes for the Members folder. By default, index_html will bring up a ‘search for members’ template, which I never found very useful, and always wanted to replace with a nice smart folder. First go into /Members in the zmi, select index_html (it’s in there somewhere amongst all the members), and rename it to something like index_html.old. Now, somewhere outside of Members, create the item you want to have as default view, and paste it into Members with title (guess) index_html.
This is a rather contrived way of going about things, I admit: Atmasamarpan tells me there is an index_home python script which calls index_html as the default view for the Members Large Plone Folder (which I have yet to find). Rename this script and you can access the display tab as normal. (Note: if you dont rename the script and there is no index_html item, you will get a site error when you try to acess the Members folder in Plone),.