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Units {pixels} | normalized | inches | centimeters | points | characters
Unit of measurement. This property specifies the units MATLAB uses to interpret size and location data. All units are measured from the lower-left corner of the screen. Normalized units map the lower-left corner of the screen to (0,0) and the upper right corner to (1.0,1.0). inches, centimeters, and points are absolute units (one point equals 1/72 of an inch). Characters are units defined by characters from the default system font; the width of one unit is the width of the letter x, the height of one character is the distance between the baselines of two lines of text.
This property affects the PointerLocation and ScreenSize properties. If you change the value of Units, it is good practice to return it to its default value after completing your operation so as not to affect other functions that assume Units is set to the default value.