The Currency window and wallet

Ctrl+Shift+O, or the top-menu Currency button, opens the crafting window. It is also the Currency tab of the stash window (Depot and stash).

The wallet. Orbs, Scrolls of Wisdom, Orbs of Regret, Jeweller's Orbs, essences and salvage shards are kept as counters, not as items in your backpack. When one of them reaches you from a corpse, the ground or a party draw, it leaves your bag and the count goes up ("+1 Chaos Orb"). Gold is the bank balance and is shown in the same place; looted coins go straight to the bank. The wallet is shared by the characters of one account in the same mode and realm (Hardcore and Solo Self-Found).

Not in the wallet: Portal Scrolls, runes, maps, Writs, Sigils, Seals and quest items.

Crafting. Drag a carried item onto the slot, then click a currency. The orb is used with the usual rules (Currency and orbs) and is spent only when the craft works. A refused craft costs nothing. The slot points at your item; it does not move it.

Buttons

Salvage turns the slotted item into shards, with the same rates as automatic salvage. Uniques are refused (The loot filter and salvage).
Deposit all files every wallet currency you carry, for items that arrived by trade or from a shop.
Clear empties the slot.

Withdraw. Right-click a currency in the window to make a stack of it (or coins) in your backpack, for example to trade. Only in a protection zone, and not during a trade.

The window also shows your session: how many items were salvaged and how many shards and orbs they gave.

Shards combine automatically, 20 to an orb, and can never be withdrawn.

Death never changes the wallet.