What do you mean by screen magnification technologies? Discuss screen magnification technologies for learners with visual impairment.

A screen magnification system enlarges text and graphics on a computer screen. It is loaded into the computer’s memory and functions similarly to a magnifying glass moving over a page, following the cursor, and magnifying the area around it. Using a mouse or keyboard commands, a user positions the cursor on the section of the screen to be magnified or has the cursor move automatically across and down a magnified page at a preset speed. The magnified area may also be emphasized with color and shading, so that users who lose their place on screen may easily locate a magnified area. Fonts used in magnification programs are usually designed to smooth out the jagged or “stair-step” appearance of computer-produced diagonal or curved lines. Today’s full-featured screen magnifiers can magnify all items on a screen, including the mouse pointer, text cursor, icons, buttons, and title bars. The magnifiers also provide a set of mouse tracking features.

Persons with considerable vision may not need a screen magnification program. Instead, they may use a larger monitor that allows for larger text or graphics while keeping all material _____ __________ ______ _________ _________ ______ ________ __________ __________ ________ ______ ________.
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