What I miss in Assault Cube

[#M|A#Wolf]

1) is there a way to configure a button to immediately throw a grenade without going through the "change weapon" and then throw? Some players seem to be able to throw a grenade almost instantly and I wonder if they do not simply press one button.

Hold right click then release.

2) also, is there a way to apologize for shooting somebody on my team? I know the game sometimes says "sorry", but I did not find a way to do that.

Press the V key. Then 4 then 2