Vote for this! It is one of the reasons why I continue using gmail. Gmail is still the gold standard for me.

I normally split my screen on two section, on the right for notes and on the left for the browser (where Proton Mail lives). When I switch to Proton Mail it's impossible to read email because it's just not responsive.

The left side bar and email list should collapse while reading a single email and there should be buttons for next unread email or similar.

I believe this is very important for usability reasons.

I read my emails on the vertical monitor, this feature is essential and the lack of it is really annoying.

Came here to say this.

We need the option to collapse or close the left-hand navigation menu.

+1. been wanting this for a long time now

+1. been wanting this for a long time now

Indeed, the left side folders are only needed when I need to switch folder. But most of the time when we are browsing the email list and reading the mails, the menu is just a clunky waste of space.

would you please add the option to be able to minimize the left bar

Would be nice to collapse the left-hand menu on the web app when the browser size is not too big. This is useful when pinning a window or having limited width space available.

Screenshot of idea: http://imgur.com/1wXyjdo