Update README.md

README.md

@@ -33,11 +33,13 @@ Installing the Tool
 
 - Install via the **latest package link below**
 - Ensure your **Apex classes are compiled**
+- Assign the **Apex UML** permission set
 - Go to **Apex Classes** page and click the **Compile all classes** link
 - Navigate to the **Apex UML** page and select a class
-- You will see a **Remote Site** setting message popup, follow it and then reload the page.
 - Your good to go!
 
+**NOTE:** If your org is not using My Domain, you will see a **Remote Site** setting message popup, follow it and then reload the page.
+
 ### Package Versions
 
  - v1.7 [Production Install](https://login.salesforce.com/packaging/installPackage.apexp?p0=04t0H000001ICQm) or [Sandbox Install](https://test.salesforce.com/packaging/installPackage.apexp?p0=04t0H000001ICQm) - Fix for issue [14](https://github.com/afawcett/apex-umlcanvas/issues/14) collection size exceeded. Also migrated repo to SFDX and added Lightning support. Remote Site setup no longer required for My Domain orgs.