Display point markers
This function permits you to draw a marker at points that you specify using standard range specifications. The presentation style for the data that are drawn is defined in the drawing styles file that is associated with the string file in the active graphics layer. This function only draws markers and disregards the Drawing Method defined in the styles file.
To run this function: Choose Display > Point > Markers, or...
Note: This function only draws data from the active graphics layer.
Layer name
The name of the layer from which the data are to be drawn may be entered here. The active layer is provided as the default value. You may draw data from all graphics layers by leaving this field blank.
String range
Enter the string range which is to be drawn on the screen. The range must be a standard range specifier. You may leave the range blank if you wish to draw all strings in the layer.
Segment range
Enter the segment range which is to be drawn on the screen. The range must be a standard range specifier. You may leave the range blank to draw all segments of each string that is to be drawn
Seg pnt range
Enter the segment point range which is to be drawn on the screen. The range must be a standard range specifier. This is in fact the range of points within each segment for which the markers are to be drawn. Leaving this field blank will cause the system to draw all points in each segment that is to be drawn. To obtain different effects, a value of "1,2" would draw only the first and second points of each segment.
Range specifications
A range specifier takes the form of 'a, b, c' where each of the values 'a', 'b' and 'c' represent real numbers and it is interpreted as from 'a' to 'b' in steps of 'c'. The value 'c' is optional and if it is not present then a step size of 1 is assumed. The value 'b' is also optional and if it is not present then 'a' defines a single value. Ranges can be made complex by concatenating ranges together using the ';' character. Thus a complex range may take the form, '1,9,2;20,100,10'.
Desc field number
The entry in this field has no effect for this function.
Location for legend, Legend title
It is often very useful to have a legend presented on the graphics screen to provide a simple and intuitive means of describing the meaning of the colours for each of the strings that have been drawn. A number of drawing functions have the ability to create such a legend for the data which is drawn.
Follow this link for complete details on how legends work for each of the functions which draw string data.
Result
The specified data are drawn