Hello Erveryone,
As default you can see the under the tab "Time Tracking" the values for "Estimated:", "Remaining" and "Logged" Hours.
But when you are create a worklog you have the option to choose between "Worked" and "Billed" Hours. 
I now want to create an extra field with the "billed" hours under the "Time Tracking" Tab but I wasn't able to with a custom field. (see attchated screenshots)
Is it possible? (I couldn't image why not) and if yes how to?