Unwanted huge block of uselessness popping up on the right of my screen

I'll try that too! Thank you.

Thank you Abhishek. I had reset InDesign preferences everytime I've closed and reopened it. It works for a while then it all the other bugs return (cursor and pages flying at speed when I try to carefully move to another part of a single page for example). Since posting the above I closed InDesign and restarted with shift, control, option and command keys down yet again.

The panel re-emerged briefly when I tried to change the weight of a font using the top left tool on the [printing and proofing] workspace menu but fortunately disappeared when I went back to the text I was working to try another method to change that font. Which reminds me that what I just described is another bug I've only found in the past week.

Am wondering if this bug is a reaction to a Word document I've been trying to work with for a client. They sent me a 70 page report and my attempts to strip out the formatting (numerous Word style sheets with multiple footnotes etc) was proving a nightmare. I'd tried to strip this out in Pages first but it was taking so long I thought I'd just let InDesign deal with it. In short, it failed.