Hi Azoolkool, I figured it out, so here goes: Under Keynote open your file, make sure your View is set up as Navigator view; this way you can see the mini-sidebar on your left side. On the individual slides highlight the slides you want printed by holding down the shift button and click on for example 7-12.
Now click on File>Print, go to pages and enter in section From: 7 to: 12, Right under this area u should see Keynote drop down bar and on the bottom left area it states: PRINT with some options there, just check off "Individual Slides". To the right of the print section it should state OPTIONS; to keep your slides in color remove the check on "Don't print slide background or object fill". Do check "Add borders around slide" and "Use page Margin".
Under the FROM and TO page area where you put 7 and 12 in - there is a drop down bar that defaults to Keynote, click on this and go to PAGE ATTRIBUTES to change your page orientation to portrait or landscape. Once done proceed to next step and click on PDF on the lower left hand side and enter into "OPEN PDF IN PREVIEW". It should default to the 7th page as full screen along with the sidebar appearing.
Now click on File in the preview menu bar and then PRINT - Now uncheck the AUTO RATE and now check the "SCALE TO FIT" - "FILL ENTIRE PAPER". Then below that where it says images per page , change it from 1 to 6 and notice the print preview with six slides on one page. Now hit PRINT on the lower right hand side...
Hope this helps, I had to learn the hard way today "Trial and Error" as the manual does not state this clearly. Also I'm sure there is a better way but no one has responded yet. Let me know if it works.
Regards