~ $ xbindkeys -mk
Press combination of keys or/and click under the window.
You can use one of the two lines after "NoCommand"
in $HOME/.xbindkeysrc to bind a key.

--- Press "q" to stop. ---
"NoCommand"
    m:0x100 + b:1   (mouse)
"NoCommand"
    m:0x400 + b:3   (mouse)
"NoCommand"
    m:0x200 + b:2   (mouse)
X connection to :0.0 broken (explicit kill or server shutdown).