Use Selections to isolate an area of a photo in order to apply edits or filters to only that area, rather than the whole photo. There are
To Use a Selection Tool:
You can use Selections with the following Edit tools:
Freehand Lasso: Click the left mouse button and drag the cursor to draw around the area that you wish to select. As you draw, a line appears showing where you have drawn. When you release the mouse, the end of the line joins to the start automatically to complete the selection. The whole selection animates and looks like marching ants.
Magic Wand: Click on any area of the image and all the pixels the same color are included in the selection. You can choose whether to select only the same color pixels that are actually touching the one you clicked, or all the pixels in the photo that are similar. You can increase the threshold to include more pixels in the selection. The lower the threshold, the more similar a pixel has to be to the one clicked in order to be included. The greater the threshold, the more different a pixel can be and still be in the selection.
Rectangular or
Elliptical: Click and drag either a rectangle or an ellipse that begins where you first click and ends when you release the mouse.
Brush: You can use the Brush selection tool to target your selection based on color, brightness, or a combination of both color and brightness. Select Color, Brightness, or Magic from the drop-down menu in the Context bar to define your selection. Then align the center of the brush with the color, brightness, or combination that you wish to target and begin brushing. You can increase the Tolerance to include a wider range of pixels in your selection. The lower the Tolerance, the more similar a pixel has to be to the one clicked in order to be included. You can erase the selection by right-clicking.You can customize the look of your selection based on the visualization best suited to your selection task.
To Customize the Selection Overlay:
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Marching Ants |
This option outlines the selection with animated dashes. |
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Selection Highlighted |
This option highlights your selection in the color of your choosing. Select a color from the drop-down menu. You can customize the transparency of the color overlay by using the Opacity slider. |
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Selection Exposed |
This option highlights the non-selected areas of your image in the color of your choosing. Select a color from the drop-down menu. You can customize the transparency of the non-selected area by using the Opacity slider. |
To Use the Lasso:

When you release the mouse, the original selection expands to include the outer edge of your addition.

As long as you do not touch the line of any other selection, you can add several separate areas to a selection.

Now the selection includes all the outside areas of the image with the central area outside the selection.
You can preview the selection mask by holding down the Preview button: 
You can select an editing tool or a special effect to apply to the selection.
To Use the Magic Wand:
Color is generally your best option.
You can preview the selection mask by holding down the Preview button: 
You can select an editing tool or a special effect to apply to the selection.
To Use the Rectangular or Elliptical Selection Tool:
You can preview the selection mask by holding down the Preview button: 
You can select an editing tool or a special effect to apply to the selection.
To Use the Brush Selection Tool:
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Color |
Selects pixels based on how similar they are to the color value of the pixel in the center of the brush, depending on the Tolerance setting. |
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Brightness |
Selects pixels based on how similar they are to the brightness value of the pixel in the center of the brush, depending on the Tolerance setting. |
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Magic |
Selects pixels based on how similar they are to the combination of the color and brightness values in the center of the brush, depending on the Tolerance setting. |
To remove areas from your selection, right-click and drag over the area you want to deselect.
To use the brush as a regular selection tool, hold down SHIFT while brushing.
You can select an editing tool or a special effect to apply to the selection.
You can right-click a slider to reset to the default value.
You can use the Selection tools separately or in combination. For example, you can use the Magic Wand to select most of a particular color, then switch to the Freehand Lasso to add to, or subtract from, the selection. Or you could use the Rectangular selection to select a large general area, then refine it using the Freehand Lasso.
To Combine Selection Tools:

Saving Selections as Presets:
You can save your settings as a preset for future use. After you have made a selection, click Select | Save Selection...
To use a previously saved selection, click Select | Load Selection...
To delete a saved selection, click Select | Manage Selections...
To Cut and Paste Selections:
Your selection will paste onto a new layer above the selected (active) layer in the Layered Editor.
To Delete Selected Pixels:
You can delete selected areas of images or masks. To retrieve your deleted pixels, use the Undo button.
You can also delete pixels by pressing ALT + DELETE.
To Create a Layer Mask from a Selection:
To Add or Subtract a Mask from a Selection:
To Intersect a Mask with a Selection: