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--- a/graphics/pgf/contrib/pgf-spectra/README
+++ b/graphics/pgf/contrib/pgf-spectra/README
@@ -1,20 +1,29 @@
-This is pgf-spectra, version 1.0 (15/04/2016).
+This is pgf-spectra, version 2.0.0 (15/03/2021).
-This package provides the \pgfspectra[<options>] command which draws continuous and emission or absorption spectra for 99 elements and their ions.
-It was developed mainly for the writing of my own documentation and exams sheets supporting directly PDF output format.
+This package provides the \pgfspectra[<options>] command which draws continuous and emission or absorption spectra for 98 elements and their ions. It was developed mainly for the writing of my own documentation and exams sheets supporting directly PDF output format.
The drawing is made with the TikZ package and is based in the pst-spectra extension for PSTricks.
+____________________________________________________________
-** Requirements
-TikZ and ifthen packages.
+Major changes:
+- the 'window' of spectra now ranges from 10nm to 4000nm
+ and the lines was updated. (In version 1.0 was 380nm to 740nm)
+- support for redshifted (blueshifted) lines
+- possibility of setting a style for the spectra's
+New commands:
+- \pgfspectraStyle
+- \pgfspectraStyleReset
+New keys:
+- axis ticks (axis minor ticks)
+- backIRUV (only for emission spectrum)
+- IRcolor (for emission lines and for the background in absorption spectrum)
+- UVcolor (for emission lines and for the background in absorption spectrum)
+- red shift
+- show redshift value
+____________________________________________________________
-** Installation
-Unpack everything in a directory in the TeX search path and refresh the TeX database.
-
-** Usage
-Just place \usepackage{pgf-spectra} in the preamble.
-
-** Contact the author
-Hugo Gomes (hugo.parelho@gmail.com)
-
-** Licence
-Released under the LaTeX Project Public License v1.3 or later, see http://www.latex-project.org/lppl.txt
+** Requirements: TikZ package.
+** Installation: unpack everything in a directory in the TeX search path and refresh the TeX database.
+** Usage: just place \usepackage{pgf-spectra} in the preamble.
+** Contact the author: Hugo Gomes (hugo.parelho@gmail.com)
+** Licence: released under the LaTeX Project Public License v1.3 or later, see http://www.latex-project.org/lppl.txt
+____________________________________________________________ \ No newline at end of file