Add Open with Impressive to Elementary OS context menu.

Impressive is a program that displays pdf presentation slides in style. If you use beamer to create presentation it is a must have.

Usually it works by running the command impressive [path/filename] in the terminal/command promt. However, when you are stressed out and standing infront of a crowd, it is not always the fastest way to use the app.

In Elementary OS, one can modify the contextual file menu in pantheon-files by using the following code

[Contractor Entry]
Name=Run Impressive
Icon=terminal
Description=Run impressive on selected file
MimeType=application/pdf;application/x-pdf;application/acrobat;applications/vnd.pdf;text/pdf;text/x-pdf;
Exec=impressive
Gettext-Domain=pantheon-terminal

Save the file with the extension .contract in the contract folder, located in /usr/share/contractor. After you save the file, the context menu will look like this when you write click on a pdf.