You can adapt the toolbar to your needs. Please use the following entry in the main menu:
Configure toolbars
You will see this dialog, which allows adding and removing buttons from the main toolbar of BibleTime. The order of the buttons can also be changed.
The Toolbar configuration dialog.
Use the 4 buttons in the middle of the window to move buttons to the toolbar, away from the toolbar or to sort them on the toolbar according to your preference.
Please see this section for further information.