|You can take snapshots of images as you process them. A snapshot is stored as a bitmap of the current center view and is kept as long as you stay in the darkroom. A snapshot can then be selected and overlayed in the current center view to help you with a side by side comparison (left: snapshot, right: active) when you are tuning parameters of a module. This can also be combined with history (see Section 3.3.3, “History stack”) to compare the snapshot against different stages of development.||
You can control the split view by moving the splitline back and forth. If you hover with the mouse over the splitline, a small rotation icon will appear on the center of the line. Click it to change between vertical and horizontal split view.