Hi, I`m struggling to get `Email` shown on the Activities component for Opportunities in Lightning. I tried to add Email to the Salesforce Mobile and Lightning Experience Actions on the page layout - I can drag it there, but it doesn`t get saved. I tried it a number of times. I also understand that the right button to add is: Send an Email, but I don`t have that option.

If I switch back to Classic, I have a Mail Merge button, but when I click on it all I get is that my browser is not supported - I use Chrome. 

I`m not sure what am I missing.... Please can you help with this? Thanks!