To customize the fields in the Requests module:

1. Go to Setup > Customization > Modules and Fields.
   
2. Select Requests.
   
3. On the Module Builder page:
   
1. Drag and drop fields from the New Fields tray into the layout.
   
   
   
   
2. Set properties such as Field Label, Type, Mandatory status, etc.
   
   
   
   
4. Click Save to apply the changes.
   

1. Only users with the Administrator profile can perform this action.
   
2. The number of custom fields you can add depends on your Zoho FSM edition.
   
3. Refer to the Pricing Help for detailed edition-specific limits.