Enable/Disable Credits for customers.
Set credits earning rule, refer friend rule and spent rule.
Set credit value for each rule and comment/reason
Go to GET STARTED -> Manager Settings OR
Sidebar Menu -> Settings
Click on "VIEW" in the block "Reward/Credit Settings".
Click on "VIEW" button in Reward/Credit Settings block opens the page which is shown as below
In General settings tab
1. Enable/Disable Store Credit for customers
2. Enable/Disable display earn, spent credit rules on customer dashboard
3. Enable/Disable auto install credits drop down so that customers can use their credits
4. Click on SAVE button to apply setting.
In Earning Rule, you can enable or disable customers to earn credits and set credits for each rule.
Credit earning rule page is shown as below
In Refer Friend Rule, you can enable or disable customers earn credits by referring friends and set credits for each refer friend rule, Refer Friend Rule page is shown as below 
In Spent Rule, you can enable or disable customers to spend their credits and set spending credits on their cart value range, Spent Rule page is shown as below 
1. Please follow the full document for credit settings General settings.
2. Please follow the full document for credit settings Earning Rule settings.
3. Please follow the full document for credit settings Refer Friend Rule settings.
4. Please follow the full document for credit settings Spent Rule settings.