Item stacking
From Guild Wars Wiki
A Stack is a group of identical items that can be stored in a single inventory space. If an item is stackable, up to 250 copies of it can be held in one stack. The total number of items in a stack is shown as a yellow number over the top of the item's icon.
If you have two stacks of an item, you can combine them by dragging one over the other; if there are more than 250 units total, the stack dragged into will be filled and overflow will remain in the original stack. A stack can be broken by shift-dragging: a dialog will appear when you place the item allowing you to specify the new stack size.
When items are automatically added to a container — by picking them up off the ground, recieving them in a trade, or dragging them onto a bag icon or storage tab — partial stacks of that item in the container will be filled before an empty inventory slot is taken.
Stackable Items
- Common and rare Crafting materials.
- Dyes of the same color.
- Keys and Lockpicks.
- Certain quest items.
- Experience and passage scrolls.
- Tomes of the same profession and rarity.
- Trophies, including reward trophies for quests, such as Monastery Credits, and festivals, such as Lunar Tokens.
- Hero armor upgrade items.
- Salvage items that do not represent armor, such as hides and webs.
