Cloud APIs & Sdks for adding watermark for Microsoft Excel & OpenOffice Calc. Adding watermark for local spreadsheets by the Cells Cloud API. Sdk support kinds of development languages. They include Android, C#, Go, Java, NodeJS, Perl, PHP, Python, Ruby, and swift....Cells Java Background ADD-WATERMARK Background Java API to add...OpenOffice Calc spreadsheet Java library to add watermark for...