The highlight of the minor differing character to the left of caret is virtually invisible.

I can find no way to change the space display to e.g. ␣ , or the character background colour.
Solutions?
PS Is "Button shadow" here http://i.imgur.com/JSy8TPa.png really intended?

I can find no way to change the space display to e.g. ␣ , or the character background colour.
Solutions?
PS Is "Button shadow" here http://i.imgur.com/JSy8TPa.png really intended?
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