How does one change the gravity on a map?

I read somewhere that this might carry over to the next level on the same server. How does one prevent that from happening? (if it does)

Change gravity for the whole map? Set the gravity key in the worldspawn spawnflags to the gravity value you want.

Taiyo.uk wrote:Change gravity for the whole map? Set the gravity key in the worldspawn spawnflags to the gravity value you want.

Just "Gravity" and a number?

But will this follow into the next map on the server?

i remember there was a command (or alias) that would "clear" the config settings after the map.

add the following line in the .mapinfo :
settemp_for_type all sv_gravity 400

Ronan wrote:add the following line in the .mapinfo :
settemp_for_type all sv_gravity 400

What does that line do? Set gravity to 400 (whatever that s) for the duration of the game? Or reset it to 400 when the game is over?

Both. settemp settings are always restored at the end of the match.