Opportunity Email Quotes You can't email a quote directly from the PDF preview, the quote detail page, or next to the PDF in the Quote PDFs related list. Instead, create and save a quote PDF from Salesforce, and then download the PDF and email it using your local email app.
According to release notes of winter 17
Opportunity Email Quotes
You can't email a quote directly from the PDF preview, the quote detail page, or next to the PDF in the Quote PDFs related list. Instead, create and save a quote PDF from Salesforce, and then download the PDF and email it using your local email app.
Please refer below link.
https://releasenotes.docs.salesforce.com/en-us/winter17/release-notes/rn_lex_gaps_limitations_sales.htm
Thanks and Regards
Sandhya
it is something that Salesforce will fix ?
lightning lost a huge of is interest if not at least offering same features than Classic ...
Thanks