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7. The Menus / 7.6 The Tool Menu

### 7.6.15 Color/Set Color Profile

PhotoLine can assign an ICC color profile (see chapter 2.12) to layers, pages and whole documents. On displaying a layer on the screen the color profiles will be used according to the following rules:

- If the layer has an own profile, this one will be used.
- If the layer has no profile, the profile of the next group will be used which the layer is embedded in.
- If no group has a profile, the profile of the page will be used.
- If the page doesn't have a profile, the profile of the document will be used.

If your document is a picture (see chapter 2.11) the background layer cannot have a color profile on its own. Instead the profile will be assigned to the whole document. In the Attributes dialogs (see chapter 4.9, chapter 4.10 and chapter 4.11) you can inspect, whether a color profile is assigned to a layer, a page or a document. Here you can delete the color profile, too, so you don‘t have to always use Set Color Profile.

By assigning a color profile the data of an image layer isn‘t changed, but they will be interpreted differently on displaying. Therefore assigning a color profile can change the appearance of a layer significantly.

Depending on the selected profile, there is the option Linear Brightness (Gamma 1.0). This is mostly used in combination with 32 bit images, because those images usually have a linear color space.

In addition to the effects above assigning a color profile to a document or page has one more important meaning. By assigning a color profile the working color space of a document/page is changed. Without color profile documents are working in RGB-mode. But after assigning a profile (i.e. a gray profile or a CMYK profile), the color space of the profile will be the color space of the document. This will influence many parts of PhotoLine:

- Adjustment layers offer the channels of the working color space for editing.
- The channel palette uses the working color space.
- If a document or a part of a document has to be rendered as image, this image will be created using the working color space. This affects normal working as well as saving.