RE: highlighter, i.e. yellow marker functionality

[Drew Adams]

> Wondering if anyone has written or can recommend a function
> (built-in/add-on) that would give the ability similar to a yellow
> marker, e.g. where MB1 down would set the background color of all
> text
> over which the pointer passes. Bonus points for not marking
> beginning of
> line and end of line white space, just like one would do with a real
> marker.  Thanks.

Yes, see library highlight.el.
http://www.emacswiki.org/HighlightLibrary

In particular, `hlt-highlighter', which is bound by default to
`C-x mouse-2', and `hlt-eraser', which is bound by default to
`C-x S-mouse-2'.