I'd love to be able to select a date range in the card spend history and then search by either merchant name or by transaction amount to pull up results specific to those transactions. For instance if I'd like to see every time my gym charged me for my membership I could either type in the amount as the search, 59.99 or I could search the card spend history by "Gym Name" and isolate those transactions. To clarify this isn't for searching transactions I did as point of sale as a merchant myself, it would be for charges made to my square card from others in the Card Spend section.
