To avoid this, we can use HyperSnap, an application that will allow us to carry out all kinds of screen captures, including game screen captures, something that many other similar tools don't offer.
When it comes to carrying out captures it offers multiple options, including captures of the fullscreen, active window, of a delimited area (rectangular or freehand area) and, even, of a full website (with auto scroll to capture the parts of the website that aren't visible on the screen).
As well as the typical options offered by other programs to automatically save the screen capture as a file, HyperSnap allows the user to automatically print the capture, being able to specify even the slightest detail.
Another option that stands out in HyperSnap is that it includes multiple drawing tools, so as to be able to enhance the captures, apply effects and even to combine the screen capture with a preselected bitmap, applying a transparency level that can range between 0% and 100%.
So, if you want an application that will allow you to capture the part of the screen that you are most interested in, download and try out HyperSnap.