Adobe Photoshop has a couple of ways to deselect either everything or a specific object:
You can deselect everything at once with one simple step.
Go to Select > Deselect.
Deselect specific sections of objects
If you wish only to deselect a specific area of your selection, you can use the Magic Wand Tool.
- Click on the Magic Wand Tool in the left toolbar.
- On top, click on Subtract from selection.
- Then click on the area of the photo you wish to deselect.