Creating a screenshot from your computer or web browser is very easy. Assuming you’re on Windows and you have any type of image editing sofware (default is Windows Paint, but Photoshop is preferred). This is how it’s done:
1 – Use the ‘Print Screen’ button on your keyboard when you’re ready to capture what’s on your screen or just a part of it. The ‘Print Screen’ button is usually right above your numeric keypad. Sometimes the button only has the abbreviation ‘Prt Scr’ on it. So yeah, press this button when you’re ready.
2 – You won’t see it but this screen has been captured on your computer’s memory. Now open an image editor. If you are using Windows Paint, make sure you’ve got a new canvas open. Then, press ‘Ctrl’+'v’ simulataneously (this is the keyboard shortcut of ‘paste’).
If you are on Adobe Photoshop, select ‘File’ –> ‘New…’ on the menu and keep the canvas size to default (it will automatically be set to the size of your screen resolution. Also press ‘Ctrl’+'v’ simulataneously.
4 – Crop your image if you need to, and remove all parts of the screenshot that you will not need.
3 – This is the tricky part. You now have to save your image. To ensure a high resolution image, you need to know the ‘save as…’ option of your image editor. If you are on the new Windows Paint, then saving it as PNG or BMP would be your best bet for high resolution. Although a BMP image will be quite large in file size so stick with PNG.
If you are on the old Windows Paint, you will not have the ‘save as…’ PNG option. So you will have to save it as BMP and then use another image editor to convert it to high-resolution JPG or another file size-friendly format. If you do not have Adobe Photoshop or any other commercial software it is not a problem. There are lots of free editors out there, e.g. GIMP, Paint.NET, Inkscape, Photoscape, etc.
If you are on Adobe Photoshop then this will be easy. You can save it to any format you want, e.g. .gif, .png, .jpg, etc.