When configuring field-level help text (tooltips) in Salesforce Lightning Experience, line breaks or carriage returns entered in the help text field are not saved or displayed. The help text renders as a single continuous line of plain text, ignoring any formatting.
Field-level help text (tooltips) in Lightning Experience is designed to display only plain text. This supports the best practice of showing simple, concise guidance about a field. Advanced text formatting, including line breaks, is intentionally not supported in this context.
Vote and voice your opinion to allow this feature in a future version by visiting the Idea Exchange for Salesforce.
Create Custom Help Content as an alternative for richer help content
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