Five neat presentation tricks. PresentationTube. Instant screencasts: Just click record. How to Edit PDF Files - Free Tools for Manipulating PDF Documents. The PDF file format was originally created by Adobe in the early ’90s and it now the most popular format for exchanging all sorts of documents including presentations, CAD Drawings, invoices, government forms and other legal documents.
There are several reasons why PDF file format is so popular. PDFs are generally more compact (smaller in size) than the source document and they preserve the original formatting. The content of a PDF file cannot be modified easily and you can prevent other users from printing or copying text from PDF documents.
Dropbox.