In Photoshop how do you make your whole picture gray?

Never did used Photoshop before

In Photoshop how do you make your whole picture gray?internet security

Image%26gt;Mode%26gt;Grayscale

I think

In Photoshop how do you make your whole picture gray?network security

1.Greyscale

2.Colour balance

3.Hue/Saturation!!!
as in grayscale? go to image%26gt;mode%26gt;grayscale

while shopping

give to atheist