Cannot print slides in El Capitan

I'm still using the GM beta of El Capitan

Using a beta and indeed a first release of a new version of an operating system should be regarded as an experiment for the end user.

It should not be regarded as a fully functioning reliable product. The Mac OS will be continually updated during the lifetime of the release, so there should be no rush to use a new release of an OS.

The golden rules of upgrading the OS:

• if there are no compelling reasons to upgrade, don't. The Mac will still work perfectly well without upgrading
• create an additional backup of everything on your Mac (preferably a bootable clone of the existing drive)
• never update while existing projects will be edited
• never upgrade without fully testing the new OS, using a second drive or a second Mac
• always perform a clean install when upgrading (the drive is repartitioned to erase all files before installing the OS)
• use a second bootable drive if you must upgrade mid project
• if you are unable to do any of the above, do not upgrade

No thanks for what fike a rather condescending reply

Stating facts is considered condescending from where you are? The golden rules were given to me in 1978 at university by the computing department when using a VAX mainframe, they are as relevant today for Mac as they were then.

that does nothing to help resolve my problem.

Yes sorry, I missed that bit out, re-install Keynote, if that doesn't work re-instal the previous OS or wait for the next set of El Capitan updates that fix these bugs.

Your post amounts to saying, Here's how you should have done it."

Correct, thats exactly what Im saying,

So I do not need common knowledge advice. I choose to install beta software because I enjoy making a valuable contribution to the development and debugging process.

Then you must be prepared to live with any resultant pitfalls, thats the user agreement you made with Apple when signing up for beta software use.

Please do not assume you are talking to a novice.

No-one knows what level of expertise posters have unless they state that in the original post, equally posters are furious when replies use everyday Mac terminology and complain they are beginners and don't want treated as advanced users. The average Mac user who uses Keynote is at school, producing a presentation for a project, has never used Keynote before and has never received appropriate training.

There is always a flurry of questions after a dot zero release of the OS, after a few patches have been released the queries die down.