emails from a hide-my-email alias
Have the ability to send an email from a hide-my-email alias, I know you can reply using the alias but would like the ability to select it from a drop down menu (from the from section).

-
Protoner commented
Yes, it would be good to email out using the alias without having received any email to the alias yet. E. g. for resolving problems or inquiry about status of procedure.
If it is important for Proton to block misuse of the alias function by using it as a second email address in the free plan, there could be an alternative form of limitational fencing:
Aliases could stay valid for a maximum of 6 months and be available for simple email reception and sending (including attachments). Expiration date should be displayed for each alias. I suppose most use cases regarding contact with potentially spamming companies would be covered inspite of such a limitation. And it could not serv as an additional email identity!