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diff --git a/components/fpspreadsheet/images/components/fpspreadsheetctrls.Spp b/components/fpspreadsheet/images/components/fpspreadsheetctrls.Spp
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diff --git a/components/fpspreadsheet/images/components/readme.txt b/components/fpspreadsheet/images/components/readme.txt
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+This folder contains the palette icons of the visual spreadsheet components.
+
+fpspreadsheetctrls.spp is the source file. It contains the various images as
+layers. Use the software "PhotoPlus" (www.serif.com) to open and edit; the
+free starter edition is sufficient.
+
+The basic icons are taken from the Lazarus images folder. The Excel overlay is
+self-drawn according to an old Excel version.
\ No newline at end of file