How to make the stereoscopic effect of light box in 3d? 1. First, select the rectangle tool in the software, set the width to 1000 pixels and the width to 1000 pixels (position), and confirm. 2. Click Set Width in the object menu to pull out the dialog box in the canvas. 3. Set the width to 600, the height to 1 100, and the unit pixel to 800×600 pixels. 4. Next, select the background option from the image menu in the background menu. Drag the image to the canvas and set the image size to 400*300ppi. Click the OK button to select the background picture, and then copy it. 5. Open the image menu in the object menu, set the image size to 400*600, and then add a deep purple image to this image. Then select the layer and paste it on the canvas. Step 2: Select the image size of the image menu. Click OK before. The specific size setting is shown in the figure below. Step 3: Select a new adjustment layer.