Merch works like a spreadsheet and a Finder window. On a computer, press ? anywhere in Merch for the shortcut sheet.
INVENTORY (Table view). Click a row to open its sizes; double-click or Enter opens the product page. Shift+click picks every row between, Cmd/Ctrl+click picks one more, Cmd/Ctrl+A picks all shown, Escape clears, the arrow keys move. A bar above the table shows how many are picked with Copy, Duplicate, Move to a category and Delete. Cmd/Ctrl+C copies the picked rows to paste into Excel, Numbers or Google Sheets (cost only for people who see merch money). Right-click a row (long press on a phone) for Open product page, Edit, Add stock, Duplicate, Move to, Delete and Copy. Delete removes the picked products (it asks first, and also removes their lines on every count). Cmd/Ctrl+D duplicates: a copy with the same name plus "(copy)", category, prices, costs and sizes, but no stock and no history.
TYPE STRAIGHT INTO PRICE AND COST. For people who can change Merch and see its money, Price and Cost are boxes in the table. Tab or Enter moves between them; a column of prices copied from a sheet pastes down the boxes. A changed box gets a gold ring until you Save (or Cmd/Ctrl+S); Undo steps back (the button, or Cmd/Ctrl+Z when you are not typing in a box; inside a box Cmd/Ctrl+Z undoes your typing), Discard drops them, and leaving the page with unsaved changes asks first.
PASTE PRODUCTS FROM A SHEET. Copy rows in Excel, Numbers or Google Sheets and press Cmd/Ctrl+V on the table (or Paste from a sheet). A heading row (Product, Category, Price, Cost, SKU, Sizes) is matched by name in any order; without one, the columns are read as Name, Category, Price, SKU. ATOM shows how many it found and adds them on your yes. Sizes like "S / M / L" become sizes; stock is entered separately.
DRAG AND DROP. Drag a row onto another to put it before that row (only while the table is in its own order, not sorted by a heading); onto a row in another category to move it into that category. Drop a photo from your computer onto a row to make it that product's picture.
COUNT SHEET (computer). Tab, Enter and the arrow keys move between In, Adds, Out and Comps; a block of counts copied from Excel pastes across and down. A box changed since the last save gets a gold ring. Undo and Redo step through the count (the buttons, or Cmd/Ctrl+Z and Cmd/Ctrl+Shift+Z when you are not typing in a box); Cmd/Ctrl+S saves. Right-click a size row for In = last close, Clear this row, Not on the table tonight, and Copy row.
REPORTS. Click a heading in Settlements by night to sort by it (again to flip). Pick nights like any list and Cmd/Ctrl+C copies them, amounts to the cent. Right-click a night to open its count or its settlement or sales report; double-click opens the count.
SHIPMENTS AND CALENDAR. Right-click a shipment for Edit, Print pack sheet, Receive into stock, Duplicate and Remove. In the Merch calendar's list, right-click a show for Open the count, Sell live, and No merch this day.
RECONCILE AND PRODUCT HISTORY. On Reconcile, pick nights the same way and Cmd/Ctrl+C copies them; right-click a night for the side-by-side, its count, or its one action (Send to Money, Bring over to the booth, Use the booth's numbers, when it has one); Enter opens the side-by-side. In a product's Tour history, pick and copy nights, and right-click opens a night's count.
WHO CAN DO WHAT. Anyone with Merch can pick, sort, copy and right-click. Typing prices, pasting products, duplicating, moving, deleting, dragging and dropping photos need Merch edit (TM, merch seller, tour accountant); everyone else gets the read-only actions only.