Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....presentation as a PPTX file $save_format = new SaveFormat(); $pres->save($dataDir.... "RectShpRot.pptx", $save_format->Pptx); print "Rotated shape...