C# .NET Core, Java, Python, C++, Android, PHP, Node.js APIs to create, process and convert PDF, Word, Excel, PowerPoint, email, image, ZIP, and several other formats in Windows, Linux, MacOS & Android....image 1 Add cells to watch window in Excel in Java 1 add charts...jpg photo 3 add text to jpg windows 10 2 add text to pdf in csharp...