Why can't I find Collections functionality in SnapGene 7.0 or later?
In SnapGene 7.0 we introduced a new Project browser, see Use the SnapGene 7.0 Interface. This new interface will eventually supercede SnapGene Collections.
In SnapGene 7.0 all Collections functionality is hidden by default. To show Collections functionality follow the instructions provided below.
Show Collections Functionality

Click SnapGene → Preferences (macOS) or Edit → Preferences (Windows or Linux), and select "Collections" in the sidebar.
Uncheck the option to "Hide Collections" functionality.

All options relating to default display settings for new Collections will be shown. See Set the Default Display Preferences for New Collections for more information.

All Collections-related commands will be available under the File menu.