go into options click mic, click push to talk, change push to talk key to hearts content, speak ingame.

For most new players it can be hard for you to stratigize but don't worry all you need is to make basic callouts sometimes that can make the biggest difference. Now let's take nuke let's say that your team is pushing A and you try to clear out ramp however you die to someone in admin and you see them start moving to heaven, so you call out "Heaven" and now your team is eagle eyed towards heaven kill the guy there plant and take out the rest of the team. Good Callout. Now let's take a bad callout you die to someone in admin and see him go through ramp you call heaven now your team is eagle eyed at heaven and they get shot through hut the enemy team converges and your team looses the round. Bad Callout. See even the smallest callout can change the entire round.

The end now leave