The basis of heads-up digitising is to use the mouse pointer to trace around the image to be digitised, recording the coordinates as it moves - in much the same manner as moving the puck on a digitising table or tablet.
Step 7 Move your mouse pointer over one of the red triangles (temples). Since the theme is active, the name of the temples (or the name of the location where the temple is situated) will appear above the triangle.
Under View menu, a new function "Geo-Coded Coordinates" is added to switch the display of current mouse pointer coordinates between "geo-coded" (with control points or TFW data applied) or image pixel space (without using control point or TFW data).
Each mouse click will output the easting and northing of the point currently located beneath the mouse pointer. A mouse-button menu is presented so the user knows which mouse buttons to use.
[ESRI software] In ArcMap, a user-assistance component that displays an on-screen description of the layer name or target being snapped to when the mouse pointer is paused over it.
In ArcMap, a user-assistance component that displays an on-screen description of the layer name or target being snapped to when the mouse pointer is paused over it. SnapTips only appear during an ArcMap edit session if they are enabled.
SNR ...
 See also: Coordinate, Pointer, Map, Location, Geographic
  
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