// Buka dokumen untuk redaksi
using (Redactor redactor = new Redactor("source.xslx"))
{
// Definisikan atribut overlay: ukuran, lokasi, warna
Size replacement_size = new Size(300, 30);
var replacement_options = new RegionReplacementOptions(Color.Blue, replacement_size);
Point replacement_point = new Point(20, 125);
var redaction = new ImageAreaRedaction(replacement_point, replacement_options);
// Targetkan area gambar tertentu
redaction.Filters = new RedactionFilter[] {
new PageRangeFilter(PageSeekOrigin.Begin, 0, 1),
new PageAreaFilter(new Point(0, 300), new Size(600, 600))
};
// Terapkan overlay pada area gambar
redactor.Apply(redaction);
// Simpan dokumen yang telah direduksi
var save_options = new SaveOptions() { AddSuffix = true, RasterizeToPDF = false };
var outputPath = redactor.Save(save_options);
}