Brett Lonsdale from Lightning Tools demonstrates Lightning Forms and how it can be used to customize SharePoint lists and library forms within both SharePoint Online and SharePoint On-Premises.
You can quickly, and easily build powerful forms which enable you to add your business logic and processes to out-of-the-box SharePoint lists and libraries. Using SharePoint, you can build views, apply filters, and add columns. Adding logic such as hiding fields based upon user selection, customizing input validation, or performing an action are just some of the additional capabilities that Lightning Forms provides.
You can download a free trial of Lightning Forms [click here]