Re-posting as a distinct thread (and re-phrasing it a bit) because I don't know if it was read by the maintainers of mRemoteNG (and I didn't get an answer).
Alt-Tab (from another application) to mRemoteNG is not enough to start typing into the active tab, instead it's needed to click inside the tab (i.e. in the hosted application, for examply, Putty).
If it wasn't for this "problem", mRemoteNG would be perfect for me (I previously used Poderosa, but I'm having some display problems lately and that project is no more developed since years).
This is because I often switch from a text editor to mRemoteNG and back using Alt-Tab, so when I switch from the text editor to mRemoteNG (where I have some Putty consoles open) I need to use the mouse and click to focus Putty. This is really weird, since I don't even have my hand over the mouse at that moment.
The solution, imho, is really simple: a key or a key combination to switch focus from mRemoteNG to the hosted application (Putty in my case).
I explain it better, if mRemoteNG would provide, for example, Tab (or Ctrl+Down or something else) to do that job I could use mRemoteNG this way:
from editor to mRemoteNG: Alt+Tab followed by Tab (no need to use the mouse and I already have my finger over the Tab key)
from mRemoteNG to editor: Alt+Tab (no need to use the mouse)
Unless this is already implemented and I wasn't able to find that key (in that case, please, let me know which is that key/key combination).