In Zylker's example mentioned above, layout rules can be created to achieve the following results.
Display section
The
Apartment section in the layout is displayed only when the
Property Type is
Apartment . In other cases, it remains hidden.
Display field
The
Apartment Amenities field displays a list of facilities. If the option "Other" is chosen, the
Other Amenities text box is displayed. On all other instances, it remains hidden.
Set mandatory fields
Additional charges is a regular field used for any miscellaneous charges. But if Additional Services are chosen, Additional charges field becomes mandatory. In other cases, it remains non-mandatory.
So, an entire layout can be made dynamic with the help of layout rules, thereby making your layout more optimized and clutter-free. Try them right away.
For more info>>
https://www.zoho.com/crm/help/customization/conditional-layouts.html