Beginner Gardening: Tall, leggy (spindly-looking) crepe myrtles, 0 by landmouse

landmouse wrote:
My husband and I recently bought our first house, and we inherited a beautiful yard with lots of plants for me to learn about. (I'll probably be posting in the beginners' section quite a bit for the foreseeable future! lol) My first question is about crepe myrtles. I've searched the forums and couldn't find my issue exactly, so I hope you'll be able to help. :-)

Across our back fence, crepe myrtles have been planted every 10 feet or so. The fence is 4 ft high, so I'm guessing the myrtles vary in height from 15 to 25 ft. The light pink flowers mark the top of the plant in this picture. I don't mind the height so much, but rather the fact that they are so leggy. None of them get full sun, and many are in mostly-shade. Is there anything I can do for them where they are? Moving them *all* is not much of an option for me because there are so many plants and no full-sun spots in the yard. Thanks in advance for your help!