How to Select All Pixels on a Layer in Paint.NET

Selecting all non-transparent pixels on a specific layer in Paint.NET requires a quick two-step workaround using the Magic Wand tool, as the program lacks a direct one-click shortcut like Photoshop. This guide outlines the exact steps to isolate and select every visible pixel on a targeted layer regardless of color or layout.

Step-by-Step Instructions

1. Activate the Target Layer
   Open the Layers window (press F7 if it is not visible) and click on the layer containing the pixels you want to select.

2. Select the Magic Wand Tool
   Click the Magic Wand icon in the Tools panel, or press the S key on your keyboard until the Magic Wand is selected.

3. Configure Tool Settings
   Look at the top settings toolbar and adjust the following:

   • Flood Mode: Change this from Contiguous to Global. This ensures the tool samples across the entire canvas rather than stopping at boundaries.
   • Tolerance: Set the slider to 0%. This guarantees that partially transparent or faint edge pixels are not accidentally grouped with fully transparent areas.

4. Click the Transparent Area
   Click anywhere on the empty, transparent area of the canvas. Because Flood Mode is set to Global, all transparent space across that entire layer will be highlighted in blue.

5. Invert the Selection
   Invert the selection so that only the actual pixels remain selected:

   • Press Ctrl + I on your keyboard, or
   • Go to the top menu and select Edit > Invert Selection.

Every pixel on that specific layer is now actively selected, allowing you to move, recolor, copy, or delete the content precisely.