From the menu bar, click Color > Components > Channel Mixer, ensure Monochrome, Preview, and Preserve Luminosity are checked, then adjust the sliders until you’re happy with the black and white version of your image.
Click Scale when you’re done to resize your image or Reset to start again.īegin by uploading an image that’s as big as, or bigger than you want your finished print to be. Making a change to one will automatically adjust the other without stretching your image.
From the menu bar, click File > Open, select your photo, and click Open.
The latest version of Gimp can be downloaded for free from this link. It’s often used for editing photos for printing onto paper, but we can also use it to optimize a photo for laser engraving by converting to black and white, adjusting the brightness, and applying sharpening.
Gimp is a professional-quality photo editor that’s available for free for macOS, Microsoft Windows, and Linux. It’s easy to engrave a photo on your Glowforge using Proofgrade settings, but most photos need a little adjustment to get the best results.