New Feature Request

Hi, Thank you so much … ?? for this wonderful plugin… I am really enjoying it…

I wanna request you if you can add a feature to get signature of the client using mouse or through touchscreen devices which can b used as approval from the client or I am trying to find a cash payment receipt where I can take the signature of the employees who has takes their payment in cash. If you can add a feature to make a cash receipt with signature to be taken from the payer, it will b good.

Please, come up with the solution to make Sprout Invoices better than the best.

Thanks!