It would be really helpful to have a signature selector directly in the email composer.

I frequently need to insert my signature manually — especially when replying to emails or using accounts that don't have a default signature set. I also often want to switch between different signatures depending on the context (for example, using a project-specific signature instead of my standard one).

Adding a button in the composer that lets me choose from a list of saved signatures would solve this friction completely. This is a very common and well-established feature in most modern email services (Gmail, Outlook, Fastmail, etc.).

It should be a fairly straightforward addition, but it would significantly improve the daily email experience.