I want to create a membership site with galleries and teasers for the galleries before the login.

Hi! Welcome to Composr CMS.

What you want to do is possible with Composr CMS. However, it may require a little configuration. Composr does not have permissions on a gallery entry [individual images/videos] level (only on the gallery itself).

What you could do is this:

• Set up a "teaser gallery" and a "members only" gallery
• Set permissions so that guests can view the teaser gallery but not the "members only" gallery. Ideally, you should also set the teaser gallery to *only* be visible to guests. That way, members don't accidentally go to the teaser gallery and wonder where everything is.
• For each set of photos, create a sub-gallery both under "teaser" and "members only"
• Only add the photos that you want guests to see under the "teaser" sub-gallery that you created. Upload everything under the "members only" sub-gallery that you created (including the images that you also added in the teaser gallery).

That should do it for you. Let us know if you need any additional help!