Canon 90D has a Fully Articulated 3.00-inch LCD screen with a resolution of 1,040k dots. Articulated screens are more video oriented compared to only tilting or fixed screens. On the other hand, photography oriented users generally prefer tilting screens. Both the screen size and the screen resolution is up to the standards of this class.
LCD is
Touch screen type, so you can change the settings and set the focus point with your fingertips.
For those of you who loves shooting selfies, self or group photos, Canon 90D will make your life easier with its Selfie friendly screen. Another group of users who will take advantage of 90D's LCD screen are Vloggers and any video creators who are working in a single-person setup.
Selfie Friendly Fully articulated Screen of Canon 90D
90D has a built-in Optical (pentaprism) viewfinder, making it easier to shoot in direct sunlight and in other situations where it might be difficult to view the LCD monitor. The viewfinder has a coverage of 100% and a magnification ratio of 0.6x. 100% coverage ensures that what you see in the viewfinder while shooting matches exactly what you will get later in your image, helping accurate framing your shots and minimizes the need for cropping images later.