## Zoho Inventory Documentation Index

Access the complete documentation index at:
https://www.zoho.com/en-fr/inventory/llms.txt

Use this file to discover all available documentation pages before proceeding.

# Custom Module Preferences

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### Validation Rules

With Validation Rules, you can create rules to set restrictions for the data being recorded. Learn more about [Validation Rules](/en-fr/inventory/help/settings/preferences.html#validation-rules).

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### Custom Buttons & Links

You can create new buttons in the custom module to perform specific actions for your records, or to open external links. You can create them using a deluge script and execute actions based on the functions you add. Learn more about [Custom Buttons & Links](/en-fr/inventory/help/settings/preferences.html#custom-button-links).

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### Lookup Related Lists

You can view and fetch data from different modules using [lookup fields](/en-fr/inventory/help/settings/lookup.html) in the Related Lists tab. Learn more about [Related Lists](/en-fr/inventory/help/settings/preferences.html#related-lists).

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### Blueprints

Blueprints are the online representation of a business process. In Zoho Inventory, you can use Blueprints to design a process flow using states and transitions. They guide your team through the workflow, validate essential information, and automate the business processes managed via Custom Modules. Learn more about [Blueprints](/en-fr/inventory/help/custom-modules/blueprints.html).