Important Information about Salesforce Winter’20 Release
Salesforce Winter 20 Release Notes
Web : https://releasenotes.docs.salesforce.com/en-us/winter20/release-notes/salesforce_release_notes.htm
Download PDF : https://resources.docs.salesforce.com/222/latest/en-us/sfdc/pdf/salesforce_winter20_release_notes.pdf
Salesforce Winter 20 Sandbox Preview instructions
https://www.salesforce.com/blog/2019/08/winter-20-sandbox-preview.html
Salesforce Winter ’20 Pre-Release Developer Org Creation
https://www.salesforce.com/form/signup/prerelease-winter20/