Problem with color in .tiff image

[gtsolid]

Hi everyone,

in this kind of images, i would to make some mark with brush but i notice it's only grayscale.

if i try to change the mode, i see that only "bitmat" and "grayscale" are available. How can i switch to use colors?

[c.pfaffenbichler]

Please post screenshots including the pertinent Panels (Options, Info, Layers, Channels, …) and dialogs (Image > Mode).

[macpawel]

          c.pfaffenbichler    - Great idea - but maybe your image is Duotone?

Be sure you have not any adjustments layers - or paint over these layers

[gtsolid]

Voila'

i don't used an adjustement layer    

[c.pfaffenbichler · Accepted solution]

That’s a 1bit bitmap image, convert to Grayscale, then you can convert to RGB.

[gtsolid]

That's solved the problem.

Can you explain me something more? 1bit means it was created in W/B to reduce the size?

[c.pfaffenbichler]

There may have been other reasons beside file-size.

For example when halftone images are offset-printed they are printed with a halftone-screen, but the platesetter creates the individual dots of the halftone screen with a laser at a much higher resolution.

1bit Bitmap-images can be output at the full resolution of the platesetter, though.

So for a black/white illustration that does not need soft edges, gradients etc. this means that the bitmap can be printed at a much higher resolution.

This mock-up may help illustrate what I mean: