How to enable one vs one death messages in Counter Strike 1.6?

How to enable the death list in counter strike 1.6? I mean the notices we get on top right corner like this:

Steel >--------> Maverick Panther >-------> Fanatic

I mean it shows which player killed which player, with which gun. In place of arrow I have shown, there's icon of gun.

These notices keep coming on game on top right corner. I accidentally enabled & disabled it but now I don't know how to bring it back.

Solution 1:

hud_deathnotice_time <time>

The default value is 6 seconds, so if you just want to revert it to default it's hud_deathnotice_time 6