You can use the traditional way by printing your notes out on paper:
to print a thumbnail and the notes on each on a single page: File > Print > Notes
or copy and paste the text from the notes pane into a text application and print on a single sheet
To pause the recording, click the red recording indicator, or press F key to Freeze
Press any key to resume recording
When you’ve finished recording, press the Escape key to stop slideshow playback and save the recording
I had the same problem today and wanted to add my work around to this thread. In order for me to be able to read the slides while recording, I just added the text directly onto the slides. Then I recorded the slideshow and could see/read the text as I was recording, then once I was finished, I just deleted the text boxes off of the slides. It gives you a warning saying that the recording is not synced when you change the slides after the recording, but it doesnt hurt or change anything and you are able to save and export the recorded slideshow.