# 2.2.5 (2016-07-01)
# New features:
- Layers has been added to Mouse Dragging operation.
- Thumbnail display speed has been improved.
- A display method for overlays on a Viewer page has been changed in case of there is not any specified DICOM tag.
- Level of detail for log which will be output can be chosen by SonicDICOM Manager.
# Bug fixes:
- Fixed bug that it sometimes fails to get thumbnail.