underscore not appearing in Plato

I know this is weird, but when I press the shift and minus keys in Plato, I'm no longer seeing the under-score character appear.

Rather, I get a blank space.

Moreover, when I backspace over an underscore, it removes the 'space' taken up by the underscore, but leaves the underscore sitting beneath the next character in the string.

What did I do to cause this? And how can I get back to normal operations?

Norm,

I have seen this problem before and the problem can be the font that is being used to display the code. ( the underscore is being drawn below the line and I think it is being overwritten by the line below ) The solution may be to change the font selected for the code. Check tools > options > fonts. I have courier new size 10 selected. If you have something different, I'd recommend changing and seeing if that fixes the problem.

John

Hi John

I had Courier new size 11 as my default.

I changed it to 10, and the problem was fixed.

I changed it back to 11, and the problem was still fixed.

How do I explain that logically?

Anyway, yet again, many thanks for your help.

Norm