Create new field

1. Go to the timelog app
2. Click Actions / Add field

3. Fill in the form with "Is billable" field caption, set it is "Bool" type

4. Go to the Layout tab of the app and click to open the main layout
5. On the layout editing page - drag the "Is billable" field to the layout's 1st column

6. Save layout, then Publish the updated App
7. Go to the Timelog and click "Create new" - you'd see the field is added and visible at the top