1.15. Use of Touch Gestures on Touchscreen Monitors
 | Touch gestures are not supported on macOS. |
Touch gestures enable the performance of various actions on touchscreen monitors by using fingers to make specific movements. Depending on the number of points of contact with the monitor, touch gestures can be divided into single-touch and multi-touch gestures.
Single-touch gestures are the gestures made on a touchscreen with one finger (one touch point). Here are some examples of single-touch gestures:
|
Action |
Single-touch Gesture |
| Selecting and activating a tool | Touch the screen with a finger |
| Moving the slider on the scrollbar | Touch the slider on the scrollbar and move it in the direction required |
| Context menu call-up | Touch the screen and hold the finger for a while |
Multi-touch gestures are the gestures made on a touchscreen with several fingers simultaneously (two or more touch point). Here are some examples of multi-touch gestures supported by the DICOM Viewer.
|
Action |
Multi-touch Gesture |
| Moving an image, slice, or model | Swipe two fingers along the screen in the same direction |
| Scaling an image, slice, or model | To zoom out, bring two fingers closer together; to zoom in, swipe fingers apart |
| Rotating an image, slice, or model | Swipe one or two fingers around the center of the imaginary circle or move one finger along the arc while holding the other finger in the center of the imaginary circle |
| Changing the window width and level (W/L) | To change the window width, swipe three fingers to the left or to the right; to change the window level, swipe three fingers up or down |
By default, multi-touch gestures support is enabled on Windows and disabled on other operating systems. For details on touch gestures customization, see Section 16.5.4.
The DICOM Viewer supports touch gestures in the windows of the following tabs: Image viewer, MPR reconstruction, Volume reconstruction, PET analysis, and Virtual endoscopy.
| | Some touch gestures may be inactive, depending on the OS settings. For example, on Windows 11, the touch gesture for changing the window width and level may be unavailable, as this gesture is used by default for switching between applications. For correct operation, disable three-finger gestures in the touch input settings for the OS. |
| | On Linux OS, embedded drivers are used by default to support touchscreen devices. It may cause problems with touch gestures use. |