Here is a list of keyboard commands and shortcuts that can be used in the tabs.
Tab - moves from field to field in order.
Shift+Tab - moves from field to field in reverse order.
Enter - moves to the Item column on the next line. When you are done with a line press Enter to start entering the next.
Alt+Down Arrow - activates any control in the field such as the item search, edit description, job class or flat rate drop down controls.
Space bar - adds or removes the check mark from check boxes such as Tax and Print.
Insert - press this when in the Warehouse or Item column to insert a line above the current line.
Delete - press this when in the Warehouse or Item column to delete the current line.
Alt+1, Alt+2, Alt+3, Alt+4 - press these key combinations to switch between the different tabs.