The filmstrip can be used to quickly switch between images. The images shown are the same as those displayed in the lighttable view and are defined by the currently-selected collection.
The filmstrip can be switched on and off using the shortcut Ctrl+F. The height of the filmstrip panel can be changed by clicking and dragging its top border.
Quickly navigate through the images in the filmstrip by scrolling with the mouse. In the darkroom you can change the photo currently being processed by clicking on another image in the filmstrip.
In the darkroom, the image currently being processed is selected and highlighted.