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The RAPIDDIST command, which measures distance and angle between 2D objects along X, Y axis rapidly by moving your mouse.Distances that only can be measured along X, Y axis based on the position of your mouse, are displayed dynamically as you move... Read More

Function Description: The ZOOMWHEEL system variable is used to switch the transparently zoom direction when scrolling the middle mouse wheel. Type : Integer Saved in : Registry Initial value : 0 Range : 0,1 System Variable Value: 0 : move wheel... Read More

Function Description: The ZOOMFACTOR system variable is used to control how much the magnification changes when the mouse wheel moves forward or backward. Type : Integer Saved in : Registry Initial value : 60 Range : 3 ~ 100 The larger of the value,... Read More

Another related system variable is ZOOMWHEEL which can toggles the direction of transparent zoom operations when you scroll the middle mouse wheel.   0 :Moves wheel forward zooms in; moving wheel backwards zooms out   1 : Move wheel forward... Read More