For capturing screenshots of QR codes on your Samsung device, you can use a combination of the Quick Settings panel and the camera app. Open the Quick Settings panel by swiping down from the top right corner of your screen, then tap the 'Camera' icon. Use the camera app to scan the QR code, and once scanned, the camera will automatically save a screenshot of the QR code. Alternatively, you can use the Samsung Notes app to capture a screenshot of a QR code - simply take a new note and open it in edit mode, then tap the 'Scan Documents' button to capture the QR code. Either method should allow you to capture high-quality screenshots of QR codes for easy reference or sharing.