Make sure that the picture mode is set to RGB it allows you to apply color to the image. Image – Mode – click RGB Color.
Select the Polygonal Lasso Tool from the tool bar. On the picture, click once on the location where you want to start selecting and move the mouse to the location at which you want to change direction; click once again. Until you have a region of your choice selected. I am just selecting an arbitrary area in the sky. Ctrl + d keys can be used to de-select. (You can do this with any selection tool of your choice, just so you know) Once your selection is made, go to Image – Adjustments – Hue/Saturation… which will open the Hue/Saturation window.
First thing you need to do is check the Colorize checkbox, now you can play with the sliders to adjust the hue, saturation and lightness of your selected area. The best advice here is to just try things out. When your happy with the color, click OK.
Hue – the color
Saturation – the intensity of the color
Lightness – how bright or dark the color is (make the color closer to black on the left or white on the right-hand end of the slider)
Now pick the Magnetic Lasso Tool from the toolbar. Again click once on the location in the picture where you want to start selecting. If you trace very slowly and carefully, the tool will try to put direction points where it thinks you want them. You can also place them by clicking the mouse like you did with the Polygonal Lasso Tool.
Once your selection is made, open the Hue/Saturation window again and apply the desired color. I am going to select the bottom part of the tree trunk for the first two trees.
Well that wraps it up again for today. Remember, practice makes perfect. What I am showing you is the absolute basics so that you can see what is possible and how. Now the idea is for you to play and experiment…
Cheers until next time.