V1.58 Release Notes
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1) A bug was fixed that sometimes caused Scale and Rotate to produce incorrect results when doing bilinear interpolation and the output image was wider than 2000 pixels.

2) Selections can now be copied from images larger than the Clipboard buffer as long as the selection is not larger than the Clipboard buffer.

3) It is no longer necessary to have an image window open to export measurements.

4) An optional third argument was added to the GetNumber() macro routine for specifying the the number of digits to the right of the decimal point in the default value. Use zero to display an integer default.

5) The "IndexedToRGB" macro command was added for converting 8-bit color images to RGB.

6) A bug was fixed in the macro interpreter that prevented array elements from being used as procedure parameters.

7) The Image Math command now accepts non-integer offsets when 'Calibrate' is selected.