# GroupDocs > Central documentation index for GroupDocs on-premise document processing SDKs. Explore developer documentation and guides for all product families. GroupDocs provides on-premise docum......images of various formats like PNG, JPEG, BMP. Just couple lines...mation.md)) - [How to merge PNG images using C#](https://docs...
Version 26.10 adds per‑resource external‑resource callbacks, stricter default loading policies, numerous bug fixes, and security updates. Upgrade via NuGet....Word-based documents holds a gzipped PNG and EMZ output of images is gzipped...
finance/invoice-HLP-2025-0412.pdf INVOICE Invoice Number HLP-2025-0412 Invoice Date 4 November 2025 Due Date 4 December 2025 Order Reference PO-7731 FROM Northwind Coffee Roasters 4 Roastery Lane, ......png...