+--------------------+--------------------------------------------+
| Ctrl + u | Load all of the images from a directory |
+--------------------+--------------------------------------------+
| Ctrl + r | Change the default annotation target dir |
+--------------------+--------------------------------------------+
| Ctrl + s | Save |
+--------------------+--------------------------------------------+
| Ctrl + d | Copy the current label and rect box |
+--------------------+--------------------------------------------+
| Ctrl + Shift + d | Delete the current image |
+--------------------+--------------------------------------------+
| Space | Flag the current image as verified |
+--------------------+--------------------------------------------+
| w | Create a rect box |
+--------------------+--------------------------------------------+
| d | Next image |
+--------------------+--------------------------------------------+
| a | Previous image |
+--------------------+--------------------------------------------+
| del | Delete the selected rect box |
+--------------------+--------------------------------------------+
| Ctrl++ | Zoom in |
+--------------------+--------------------------------------------+
| Ctrl-- | Zoom out |
+--------------------+--------------------------------------------+
| ↑→↓← | Keyboard arrows to move selected rect box |
+--------------------+--------------------------------------------+