Shortcuts or others

Hello everyone,

need a little helping hand. I'm sure it's dumb, but I'm level 21 and I still don't know how to say or write quickly to my teammates some details like 1-I'm coming 2-need help 3-lost enemy 4-attention and other if any.

I have seen (in fact all players use it or almost) the players put kinds of notifications in the small map to say the things I listed above. I imagine a click with a key ... or other, actually I do not know.

Thanks for helping out.