UPD:
...Sorry for posting; found the solution myself...
Fullscreen mode on doubleclick?
Moderators: helmut, XnTriq, xnview
Re: Fullscreen mode on doubleclick?
For those who have the similar question:
The mouse double click and middle click behaviour can be set in "Tools > Options | General > Keyboard/Mouse | Switching modes".
The mouse double click and middle click behaviour can be set in "Tools > Options | General > Keyboard/Mouse | Switching modes".