Make an automatic selection with the Magic Wand tool
Select the Magic Wand tool in the Tools panel.
In the Options bar, uncheck Contiguous if you want to select nonadjacent areas of similar color. Leave Contiguous checked if you want to select only adjacent areas of similar color.
Click the color in the image that you want to select.
Tip: To select a wider range of color, enter a higher value (up to 255) in the Tolerance field in the Options bar and click a color in the image.
Add to the selection
To add to the selection, click the Add to selection option in the Options bar or press the Shift key on your keyboard, and click elsewhere in the image.
Subtract from the selection
To remove part of the selection, click the Subtract from selection option in the Options bar or press the Option key (MacOS) or the Alt key (Windows), and click inside the selection.