See if it looks like a flat white surface or if there is a fine pattern visible at normal viewing distances. There's really nothing wrong with this, but it can be annoying. If it bothers you, then take it into account. On-screen Controls Generally, when buying a monitor, the more controls the better. Analog controls can easily be set incorrectly by bumping against a knob.
Digital controls are precise.
You can generally control picture size and position as well as various other image characteristics like trapezoiding, pincushioning, and rotation. More advanced controls include convergence, color controls, rotation, and moir pattern adjustment. The brightness and contrast controls are usually analog dials, but this isn't a problem because slight variations in brightness and contrast will generally go unnoticed. Always go for a refresh rate of at least 75 Hz at your favorite resolution. Some larger monitors are capable of displaying 1800 x 1440 resolution and some other very high resolutions.