First, a bit of infrastructure needs to be set up. Note that once this has been done for one talk, the infrastructure can be copied directly from a previous talk.
Make a new directory in which to put your talk:
mkdir my_talk cd my_talk
Make a directory into which you will put the Pyxplot scripts for your individual slides:
mkdir scripts
Make a directory into which you will put any graphic images which you want to put into your talk to make it look pretty:
mkdir images
Make a directory into which Pyxplot will put graphic images of your slides:
mkdir slides
Design a background for your slides. Open a paint program such as the gimp, create a new image which measures
1024×768
1024×768