Here is a summary of the steps:

1. Access Object Manager
• Go to Setup in Salesforce.
• Navigate to Object Manager.
• Use the Quick Find search bar to locate Campaign Member.
2. Find and Edit the Attribution Fields
• Click on Campaign Member and go to Field Relationships.
• In the Quick Find, search for Amount.
• You'll see 10 default amount fields created by Alignly in the unmanaged package.
• Open one of the formula fields.
3. Modify the Formula Field
• The formula field calculates attribution by multiplying the touchpoint weight by the associated Opportunity amount.
• To change it from Amount to ARR:
• Click Edit on the formula field.
• Replace Amount with ARR__c (or the API name of your ARR field).
• If unsure of the API name, click Insert, navigate to Associated Opportunity, find ARR, and insert it into the formula.
4. Update the Field Label (Optional)
• The field label may still display as "Amount."
• You can change the label to "ARR" for clarity.
• Do not change the field name (API Name) as it will break reports and dashboards.
5. Save the Changes
• Click Save to apply the update.
• Repeat this process for all 10 default amount fields if needed.
6. (Optional) Keep Both Amount & ARR Fields
• If you want flexibility in reporting, consider duplicating the amount fields instead of replacing them.
• This allows both Amount and ARR to be available for different reports, though it may create some confusion.