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	RUNNING A MACRO

Stay in or load IDRISI, do not exit to DOS; clear the display
Make sure the file idrpoly.sm2 exists in the c:\exercise directory (Use the IDRISI 
command FILE/LIST/POLYGON_SYMBOL to check). If it is not present, use 
FILE-COPY to copy it from c:\idrisiw to c:\exercise.

Select File - Show file contents - Edit
Click the macro file button, name the file to be created `display', and write the 
following macro instructions:

display x a awrajas ethiopia n x 0 0 -1 0 -1 awrajas xx idrpoly

where:
1) x = batch mode; 	2) a = autoscale; 		      3) awrajas = image file; 
4) ethiopia = palette; 	5) n = NO legend (Y for yes); 6) x = dummy place holder; 
7) 0 = automatic expansion; 8) 0 = begin columns at column; 	9) -1 = automatic column 
							           end; 
10) 0 = begin rows at row 0; 11) -1 = automatic row end; 12) awrajas = name of vector
 									 file;
13) x = dummy; 	14) x = dummy; 	15) idrpoly = vector polygon        symbol file

1 : x (to indicate that batch mode is being used); 
2 : display option ("a" = autoscale / "n" = no autoscale)
3 : input file name (the image file to be displayed; "img" extension assumed); 
4 : palette (see options below); 
5 : legend (Y = yes (including title, logo, and scale bar only) / N = no); 
6 : time delay before exit (Note: This parameter does not apply to this version of IDRISI 
for Windows. Enter "x" as a  one-character place holder.); 
7 : expansion (0 = automatic; or else a positive or negative factor); 
8 : start column (if applicable); 
9 : end column (if applicable; or else -1 = automatic); 
10 : start row (if applicable); 
11 : end row (if applicable; or else -1 = automatic); 
12 : vector overlay file (optional; name of the vector file to lay over the image file); 
13 : vector overlay color (Note: This parameter does not apply to this version of IDRISI 
for Windows. Enter "x" as a  one-character place holder.); 
14 : display outlines only? (Note: This parameter does not apply to this version of 
IDRISI for Windows. Enter "x" as a  one-character place  holder.) 
15 : symbol file (name of the symbol file to be used with the overlay vector file) 

	SAVE the file. In the FILE menu, select RUN MACRO, and enter DISPLAY 
as the macro name.

The %1, %2, etc, in the following display macro:

display  x  a  %1  %2  n  x  0  0  -1  0  -1  %3  x  x  %4 (= image file with vector file 
overlay)
OR
display  x  a  %1  %2  n  x  0  0  -1  0  -1 (= no vector file overlay)

allows interactive input of file names and palettes as `macro parameters' (variables) at 
the time the macro is run. In the first macro, the image file (%1), the image palette 
(%2), the vector file (%3), and the vector symbol palette (%4) would be specified 
(typed in) at run time.

	In the Help file, search for the item DISPLAY LAUNCHER and examine the 
entry under Macro Command. Examine the Macro Command entry for STRETCH.

FIGURES

Figure 1. Plate Tectonics.

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