> For the complete documentation index, see [llms.txt](https://magecomp.gitbook.io/shopify/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://magecomp.gitbook.io/shopify/apps/skelta-buy-x-restrict-y/collections.md).
# Collections
If you want to create restrictions on collections, perform the following steps.
**Step #1**
Go to **Dashboard** ➤ **Collections**
**Step #2**
Select the **Create Collection Rule** button to add the collections you want to create restrictions for.
Use **Collection Dependency** rules when certain collections must be purchased together. If a customer adds a product from the primary collection to their cart, products from the required target collections must also be included.
### 1. Select Rule Type
Choose how the collections should interact:
#### **Restriction**
Products from the selected collections **cannot be purchased together**. If a customer adds one collection's product to the cart, products from the restricted collection cannot be added.
#### **Dependency**
Products from the selected collections **must be purchased together**. If a customer adds a product from the primary collection, products from the target collections become required.
{% hint style="info" %}
**Example:** If "Coffee Machines" is the primary collection and "Coffee Pods" is the target collection, customers purchasing a coffee machine must also purchase coffee pods.
{% endhint %}
### 2. Primary Collection
Select the main collection that triggers the rule.
* Click **Select Collection**.
* Choose the collection that should activate the dependency or restriction rule.
* When a customer adds a product from this collection to their cart, the rule will be applied.
{% hint style="info" %}
**Example:** Select **Laptop** as the primary collection.
{% endhint %}
### 3. Target Collections
Select one or more collections that will be linked to the primary collection.
* Click **Select Collections**.
* Choose the collections that are required (for Dependency) or restricted (for Restriction).
* Multiple collections can be selected.
{% hint style="info" %}
**Example:** If **Laptop** is the primary collection and **Laptop Bag** and **Mouse** are target collections, customers must also purchase products from these collections when buying a laptop.
{% endhint %}