The editing forms are used to modify elements comprising the site content, or edit parameters of the system. For example, selecting the Edit command of the information block action menu opens an information block editing form.

Since site elements (or module settings forms) may include a lot of editable properties, some editing forms are implemented using the so-called property sheets. With their advent, property sheets are widely used to enhance user interface, and it's no wonder because property sheets allow to divide numerous properties in logical groups (pages) thus making user interface easy to handle and comprehensive. Usually, properties are grouped in such a way that first property pages in a sheet contain the most frequently used properties, while other pages hold all other parameters.

The figure below illustrates a part of the information block property sheet form.

For short, the system help section uses the term tab as a synonym of a property page.