The Dodge or Burn tool uses the current brush to lighten or darken the colors in your image. The mode will determine which type of pixels are affected.
There are different possibilities to activate the tool:
From the image-menu:
→ → .The Tool can also be called by clicking the tool icon: ,
or by using the Shift+D keyboard shortcut.
Toggle between dodge or burn types. The type will remain switched until Ctrl is released.
Shift places the Dodge or Burn tool into straight line mode. Holding Shift while clicking will Dodge or Burn in a straight line. Consecutive clicks will continue Dodge or Burn in straight lines that originate from the end of the last line.
Normally, tool options are displayed in a window attached under the Toolbox as soon as you activate a tool. If they are not, you can access them from the image menu bar through
→ → which opens the option window of the selected tool.The dodge effect lightens colors.
The burn effect darkens colors.
There are three modes:
Shadows restricts the effect to darkest pixels.
Midtones restricts the effect to pixels of average tone.
Highlights restricts the effect to lightest pixels.
Exposure defines how much the tool effect will be strong, as a more or less exposed photograph. Default slider is 50 but can vary from 0 to 100.