To use the Magic Wand tool, do the following.
Use the Zoom tool to enlarge your photograph to fill the screen with the area to be selected.
If you need to shift the image of your photograph around the screen, press and hold the spacebar.
The Hand tool is "on" as long as you hold the spacebar down.
Click on the image, hold, and drag it around.
Select the Magic Wand tool.
Look at the area to be selected, and compare it to area around it.
Which area will be easier to select?
Let's say you want to select the monument, below, from the blue sky.
If you use the Magic Wand tool, and click on the monument, the resulting selection is messy.
See the left-hand photograph below.
If you click of the sky instead, the selection is much cleaner, as seen in the right-hand photograph.
But, the sky is selected, and you want the monument.
Go to Select > Invert, or Shift + Ctrl + i, to change the selection from the sky to the monument.
Monument Selected - Messy
Sky Selected - Cleaner
Set the option bar settings.
The first icon of the foursome, New selection, should be selected.
The Tolerance setting determines how wide of a swath of color to select.
Smaller amount; less selected.
Larger amount; more selected.
For a more detailed explanation, go to Magic Wand Tool & Tolerance.
Anti-alias smoothes the jaggedness of the pixel corners from the edges of selections by averaging the colors of the pixels at the edge of a selection.
It should normally be selected.
If Contiguous is selected, only the area that you click on will be selected.
If there are separate areas on the photograph that have the same range of tone or color, they won't be selected.
If you want to select all the areas that have the same range of tone or color, deselect Contiguous.
In both examples below, the letter Y was clicked on.
When Contiguous was selected, only the Y was selected.
When Contiguous was deselected, clicking on the Y also selected other areas with same range of color.
Contiguous - Selected
Contiguous - Deselected
Select Sample All Layers if you have layers with differing content, such as a collage.
Click on the area that you want to select.
The edge (border) of the area that you're selecting has to have a lighter tone or color, on one side, and a darker tone or color, on the other side.
You can increase the contrast temporarily by using a Levels adjustment layer.
Use the middle slider to increase the contrast.
You can also use a Threshold adjustment layer.
Go to Shadows or Highlights Selections for an example.
After you've finished making the selection, delete the Levels adjustment layer or the Threshold adjustment layer.
The selection will probably need to be refined.
Sometimes it's hard to see everything that's been selected—or hasn't been selected.
You can use the Selection Brush tool to look for "strays."
Go to Look for Strays with the Selection Brush Tool.
Use one of the methods below to refine the selection.
• Delete the selection.
Go to Select > Deselect, press Ctrl + d, or press Esc, to delete the selection.
• Choose another Tolerance setting.
Smaller amount; less selected.
Larger amount; more selected.
For a detailed discussion of Tolerance, go to Magic Wand Tool & Tolerance.
To add more area to the selection, go to the options bar and select the Add to Selection icon.
It's the second icon in the foursome.
Then, click on the areas that you would like to add to the selection.
To subtract an area from the selection, go to the options bar and select the Subtract from Selection icon.
It's the third icon in the foursome.
Then, click on the areas that you would like to subtract from the selection.
You may have to use the Selection Brush tool as a mop to refine your selection further.
Go to Selection Brush Mop.
You can use the four modify operations to refine your selection.
Go to Select > Modify, and select one of the commands.
The Border command creates a border, feathered on both sides, around the original selection border.
You can enter the size of the border, and can change its color.
You can also do this by going to Edit > Stroke.
The Smooth command is based on the color of the selection.
The command searches outside the edge of the selection for pixels that are the same color as those just inside the edge of the selection.
The range of the search is defined by how many pixels you enter in Sample Radius.
The Expand and Contract commands change the selection by the number of pixels you enter.
The Grow command selects more adjacent pixels.
The Similar command selects more pixels throughout the photograph, not just adjacent ones.
Go to Select > Grow, or Select > Similar.
This command is performed after you've made the selection, and placed it on a new layer.
To place a selection on a new layer, go to Layer > New > Layer via Copy, or press Ctrl + j.
Or, by moving it to another photograph, the selection is placed an a new layer.
If the edge of your selection has a fringe of unwanted pixels, you can remove them.
For example, let's say you selected a red apple from the top of a green picnic table.
Some of the green pixels of the picnic table may be present at the edge of the selection.
When you moved the apple to a blue bowl, this halo of green pixels are evident against the blue of the bowl.
Use Defringe to change the color of the green pixels to red, the color of the selection, the apple.
Go to Enhance > Adjust Color > Defringe Layer.
You can invert a selection.
Go to Select > Invert, or Shift + Ctrl + i.
The selected area becomes the non-selected area.
Feathering makes the edge of a selection gradually fade to transparent.
Go to Select > Feathering.
Before making a change to the selection, you may want to copy it to a new layer.
By doing so, you can reduce the opacity of the layer, erase parts of it, and so forth.
To copy a selection to a new layer, press Ctrl + j.
To make changes to the selection on its new layer, make sure the new layer is active (highlighted).
If you need to move the selection border, or the area that's been selected, go to Moving Selections.
If the marching ants of a selection are distracting, press Ctrl + h to hide the selection.
Press Ctrl + h, again, to make the selection reappear.
A hidden, and forgotten selection, may create havoc later.
If a tool isn't working the way it should be, and you've been working with a selection, check to make sure the selection isn't hidden.
Just press Ctrl + h, to check.
If you no longer need the selection, save it if you wish (see below).
Then, press Esc or Ctrl + d, to deselect.
You can sometimes reselect the selection.
Go to Select > Reselect, or press Shift + Ctrl + d.
If you may need the selection again, you can save it along with the PSD file of the photograph.
You can't save a selection with a JPEG file of your photograph.
Go to Saving Selections.
Here are some tutorials that use the Magic Wand tool.