How to Add a Black Background to a Picture

There are many ways to add a black background to a picture, depending on the software you are using. Here are some general steps that can be used in various photo editing software:

1. Open the picture in your photo editing software. 2. Create a new layer by clicking on the "New Layer" button or using the keyboard shortcut (usually Ctrl + Shift + N on Windows or Command + Shift + N on Mac). 3. Fill the new layer with black color. You can do this by selecting the paint bucket tool and clicking on the new layer, or by using the keyboard shortcut (usually Alt + Backspace on Windows or Option + Delete on Mac). 4. Move the new layer behind the original picture layer. You can do this by dragging the new layer below the original picture layer in the Layers panel. 5. Adjust the opacity of the picture layer if necessary. You can do this by dragging the opacity slider in the Layers panel or using the keyboard shortcut (usually Ctrl + Shift + O on Windows or Command + Shift + O on Mac).

These general steps can be adapted to different photo editing software, such as Adobe Photoshop, GIMP, or Paint.NET. However, the specific steps may vary depending on the software version and features.