Content modelling⁡𝅶‍‍𝅺⁡‍𝅴⁡𝅴𝅹‍‍⁢𝅵‍‍⁣‌⁡⁣𝅺⁢𝅸⁡⁢‍𝅹⁢𝅺𝅸‍‍‍𝅷‍‍𝅳⁡‍⁠‍‍⁢𝅵‍‍𝅳⁡⁣⁡⁣⁡​⁡⁢⁢𝅵‍𝅺‍𝅺⁢𝅸⁡⁢‍𝅹⁣‌⁡⁣𝅺⁢𝅸⁡⁢‍𝅹⁢𝅺𝅸‍𝅺⁠⁣𝅴⁡⁣𝅺⁡‍‍𝅺𝅴⁡⁣⁠𝅸⁠𝅺⁡⁣⁡𝅴⁡​⁠⁡⁢‍𝅺⁢𝅳⁢‌⁢​⁢𝅴⁢‍⁢⁠‍𝅺𝅴⁡⁣⁠𝅸⁡⁢‍𝅺⁢⁢⁢𝅴⁢𝅳⁢⁢⁢‌⁢⁡⁢⁢⁡‍‍⁡𝅸 > Single instance models⁡𝅶‍‍𝅺⁡‍𝅴⁡𝅴𝅹‍‍⁢𝅵‍‍⁣‌⁡⁣𝅺⁢𝅸⁡⁢‍𝅹⁢𝅺𝅸‍‍‍𝅷‍‍𝅳⁡‍⁠‍‍⁢𝅵‍‍𝅳⁡⁣⁡⁣⁡​⁡⁢⁢𝅵‍𝅺‍𝅺⁢𝅸⁡⁢‍𝅹⁣‌⁡⁣𝅺⁢𝅸⁡⁢‍𝅹⁢𝅺𝅸‍𝅺⁠⁣𝅴⁡⁣𝅺⁡‍‍𝅺𝅴⁡⁣⁠𝅸⁠𝅺⁡⁣⁡𝅴⁡​⁠⁡⁢‍𝅺⁢𝅳⁢‌⁢​⁢𝅳⁢𝅴⁢‌‍𝅺𝅴⁡⁣⁠𝅸⁡⁢‍𝅺⁢⁢⁢𝅴⁢𝅳⁢⁢⁢‍⁢⁢⁢⁢⁢⁡‍‍⁡𝅸

Real-world websites have often pages which don't resemble any other (eg. the About us page, or even the homepage).⁡𝅶‍‍𝅺⁡‍𝅴⁡𝅴𝅹‍‍⁢𝅵‍‍⁣‌⁡⁣𝅺⁢𝅸⁡⁢‍𝅹⁢𝅺𝅸‍‍‍𝅷‍‍𝅳⁡‍⁠‍‍⁢𝅵‍‍𝅳⁡⁣⁡⁣⁡​⁡⁢⁢𝅵‍𝅺‍𝅺⁢𝅸⁡⁢‍𝅹⁣‌⁡⁣𝅺⁢𝅸⁡⁢‍𝅹⁢𝅺𝅸‍𝅺⁠⁣𝅴⁡⁣𝅺⁡‍‍𝅺𝅴⁡⁣⁠𝅸⁠𝅺⁡⁣⁡𝅴⁡​⁠⁡⁢‍𝅺⁢𝅳⁢‌⁢​⁢𝅳⁢𝅴⁢‌‍𝅺𝅴⁡⁣⁠𝅸⁡⁢‍𝅺⁢⁢⁢𝅴⁢𝅳⁢⁢⁢‍⁢⁢⁢⁢⁢⁡‍‍⁡𝅸

If you want to allow the editors to change their content, you can create a Single-instance model:

While collection models enable the creation of multiple records, single-instance models allow just a single item to be edited in the administrative area.