How does one view (and possibly edit) long strings when debugging?

The debugger allow you to view as much of a string as will fit it one line, and hovering the cursor will show more of it (up to 256 characters?), but even this disappears after a very short interval.

However, at times, I have longer strings (created at run time as part of SELECT statements). Is there a way that I can view and possible edit them?

Thanks,

Jim