A buyer who is already on the board mines another item. 2nd Mine adds it as a separate entry — its own price, its own label, marked 2nd — so her card shows both and the after-live can tell them apart.
Get her name into the form: double-tap her card, or wait for the new pin.
Tap the price for the second item.
Tap 🔄 2nd Mine (under the form, next to Record Only). The label prints with a 2nd mark and her card gains a second pill.
Double-click her row so her name fills the form, or take the new pin.
Select the price for the second item.
Click 2nd mine (just below Record Mine). Both mines are kept separately on her row and in the summary.