Photoshop Tutorials - Selection of the Image Areas
Selection of the Image Areas
If you want to perform any changes to the element in the image, you need to select it yourself, because Photoshop sees the image as a set of pixels in different colors and cannot distinguish the elements in the image like trees, people, cars, etc. Photoshop offers you several tools that you can use to select image areas and work with them. Once the image area is selected, the changes are applied to this area only. Photoshop offers you eight tools and multiple commands for selection of the image areas.
This may seem strange at first, but selecting all for the image is also useful. This is very useful during the layers and channels copying that we will talk about later. For now, we will learn how to select all in the image:
Open the image
Go to Select > Select All or press Ctrl+A as a hotkey. You will see the blinking dotted line around the image. Such lines surround selected areas (you can make them invisible if you want to).
Go to Select > Deselect or press Ctrl+D as a hotkey for this action. Now you have removed the selection
This is the simplest but most frequently used shapes of the selection. You can create it with special tool - Rectangular Marquee. It is very easy to use:
Select Rectangular Marquee tool.
Place it in the top left corner of the image.
Click left mouse button and drag to the bottom right of the image.
Release the mouse button. Now the selected square has the blinking dotted line around it.
Deselect by going to Select > Deselect or by pressing hotkey Ctrl+D. You can also deselect (this works for any selection tool) by clicking with the mouse in any area of the image outside the selection.
Note: Having Alt button pressed you can select moving the mouse from the center of the image to its edges. Having Shift button pressed your selection will be strictly square.
Another useful feature of Rectangular Marquee tool is that it allows you to make series of selections of the same size:
Open the Info Palette once the selection is made. W and H fields display the dimensions of the selection made.
In the Options palette open the Style list. There you will find Normal, Constrained Aspect Ratio and Fixed Size. First two are the ones we used before for making regular selections and square selections. Choose Fixed Size.
Once you will choose Fixed Size style Width and Height fields will become accessible. Enter desired values there
Now you can click in the desired area of the image and the selection of selected size will appear.
To create selections of elliptical shape you can use Elliptical Marquee tool that is located in the same panel as the Rectangular Marquee tool. Its settings are identical to Rectangular Marquee tool.
Selecting Rows and Columns of Pixels
Photoshop gives you exotic opportunity to select desired rows or columns of pixels. Using Single Column Marquee or Single Row Marquee you can select columns or rows of pixels respectively by simply clicking the desired pixel when this tool is enabled.
These tools are useful for the photo retouch when it has a horizontal or vertical distortions (lines).