Signal Button

Please add in a signal button to the game-play.

Only have good use in Co-op games. It pinpoints the grid location to your partner(s) at wherever you selected with you mouse.

How it works
Selects the signal button using the mouse at the somewhere in the user interface during the game-play.
After selected, move your mouse over desired grid location on anywhere on the map to signal your partner(s) the place.
Then watch as signal beam or whatever visual it is, is sent at the grid location.

Benefit
Very useful when playing co-op when you'd want to tell where you want the towers to put. just basically where you want the partners to see.

Specifics
Each partner has will have different coloured signals to differentiate who signaled.
Each partner can only signal every once in a while (say like 10 seconds), to avoid spamming.

..

i wanna have a cool sound! like "ramalama ding-dong"
or "uffza uffza"... "jibble-di-jibb-jibb" would also be nice!

and some fireworks and explosions wherever i use the signal button (that little blue dot isn't very eye catching ^^)

my face must look like this -> when someone pushes alt + lmb!
thanks.

PS: i actually prefer "jibble-di-jibb-jibb"!