Display percentage of parent used by each child object

[jameswestcott]

I'd like to see what percentage of a parent is used by each child object. I know the height/width of the child represents this percentage, but I'd also like to see it as a figure. It would be useful to have an option to choose where that information is displayed. Options could include:

1. Before the section bar
2. On the section bar
3. After the section bar
4. Before the entity name
5. After the entity name