Agency project work usually involves multiple components and a "menu" of choices the client has to make. Rather than building a custom proposal for every single client, it's far more efficient to template the most common project types with their typical components and related options.
The simplest, most universal example is payment method. We offer a "retail" price for clients paying by credit card versus a reduced rate for check or ACH (a "cash pay discount"), since those methods save us money. Letting the client select their choice directly in the document is exactly the kind of thing this feature should handle.
The problem: HighLevel's Documents & Contracts editor has no radio button or single-select dropdown option in its Fillable Fields elements. Without it, there's no clean way to present the client with a defined set of choices inside the document itself.
Please add single-select field types (radio buttons and dropdowns) to Fillable Fields. It would make Documents & Contracts genuinely useful for real proposals, instead of limiting it to the most basic documents that offer almost no customization.
One more thing worth flagging: this idea has nearly 300 upvotes and appears to have been marked "Complete" in error — the functionality still doesn't exist in the product. Please reopen it and reassign it to the active roadmap.