App Builder Platform-App-Builder Book

To configure a custom Lightning component for use in a record page, the app builder needs to edit a record page using the Lightning App Builder and drag the component onto the page. The Page Layout editor and the App Manager are not used for this purpose

The validation rule should be AND(ISNEW(), ISBLANK(Lead.Owner:User.Id)). This rule will prevent saving a new lead record if the owner is not a user. This will ensure that campaign members have a sales owner. Option A is incorrect because it will prevent saving any lead record if the owner is blank, which is not the requirement. Option B is incorrect because it will prevent saving an existing lead record if the owner is a queue, which is not the requirement. Option D is incorrect because it will prevent saving any lead record if the owner is a queue, which is not the requirement.

Dynamic actions are a new feature that allow app builders to create custom buttons or actions that can call Lightning Web Components and display them conditionally based on field values or other criteria. Formula fields, AppExchange products, and custom links are not able to call Lightning Web Components.

Changing custom field types may result in data loss if the new field type is incompatible with the old one. For example, changing a text field to a number field may cause text values to be deleted. Field history tracking records value changes of 255 characters or less. If a rich text field value exceeds this limit, only the first 255 characters are tracked.