Values

Value The lightness or darkness of tones or colors. White is the lightest value; black is the darkest. The value halfway between these extremes is called middle gray.

• use the histogram tool to make sure you have even values
  Here's a quick video on how to get histogram in LR mobile on ipad: https://www.youtube.com/watch?v=e0QOr0EsQAo

Homework: watch this video on how to change an objects shape without distorting it; https://www.youtube.com/watch?v=epoxmI9JuR0 ignore the end where she says ooops. if you are working on a device with storage it will save! lol.