If you are using an iPhone 12 Pro Max and have been having trouble screenshotting the screen, then this guide may be able to help. First, make sure that your iPhone is connected to the internet and that you have a compatible device like an iPad or a Mac. Then, open up the Screenshot app on your device and select the option to take a screenshot of your screen. Next, hold down the Option key and click on the bottom-left corner of your screen. This will take a screenshot of your screen in its current state - without any apps or windows open. Finally, save this screenshot to your computer by pressing Command+S (or by choosing File->Save As).