digiKam tries to give you as much control over how it works as possible. There are many options that change the behavior of the application. To access these settings selectfrom the menu-bar. The configuration dialog is separated by categories displayed in independent pages. You can change between these pages by clicking on the icons on the left-hand side of the dialog.
If you press Ok button, the configuration will be saved in your home directory and applied to the current application session. Next Session will re-use the same settings. If you press Cancel, nothing will be changed.