I have added this request to the tracker:
Issue 2451 – Easier way to toggle word wrapping in internal editor
You can vote for it there.

Could you please add this feature (a toggle button in the editor)? it will be very useful, as i like to use your internal editor.
I know it's possible to get it in the preferences, but a toggle button would be the best solution.
Thanks

Wrapping can be enabled from preferences. I may add some shortcut to toggle it.

for the internal editor:

Would it be possible to include wrap to window feature? A single button would be probably the best for this. I use the internal editor often for viewing text, or combined text/binary files, and it is quite inconvenient to use the horizontal scroll.

Thank you,
Laszlo