Connect pulldown fields such that when you make a selection in one, it shows only the corresponding values in another using dependent pulldowns.
Pulldown dependencies can span multiple levels. For example, select a Product, then the Component and Sub-Component fields are updated to show the related values.
Or, a pulldown can be parent to multiple child fields.
To make a pulldown dependent on another, edit the field to select a Parent Pulldown.
Then, map the values that are related between the parent and child option menu items.
The Dependent Pulldowns Help section contains steps for configuring this feature.