How do I keep regular color of image after using Grayness > Bitmap?

[Darreior30447449n390]

Hello. I'm trying to make a bitmap as it's written in my assignment and I go into Mode > Grayness then Mode > Bitmap (300 ppi), Mode > Grayness and Mode > CMYK.

However I can't see option anywhere to get it back to the regular colors it was set as before I used grayness as it's still gray. 

Is there any other way to set bitmap without using grayness or get back colors?

[D Fosse]

I assume you mean grayscale?

Grayscale throws out all color information and retains only a single channel. Color information is permanently lost at that point.

The only way to get back color is to go back in History, to before you converted to grayscale.

[Darreior30447449n390]

So if they tell me to do bitmap of a certain picture, they don't expect there to be any color at all.. is that correct?

[D Fosse]

Bitmap is an ambiguous term. Generally, in the broad sense, it just means a raster image made of pixels.

But in Photoshop it has a narrower meaning. Here it means a binary image where each pixel is either black or white.

And then there is the Microsoft bitmap image file format .BMP - which can carry full color information. Not much in use these days.

So when they say bitmap it can mean several things and you need to establish which one it is. The way you describe it, this is an irreversible sequence at every step, discarding information as you go. Going back in history is the only way to get back to the starting point. Perhaps that's what they're trying to illustrate.