The snapshot mode can be used to save single images from the current acquisition to the hard disk directly.

ImpactControlCenter - Snapshot Setup

For this, please follow these steps:

Select "Capture → Setup Snapshot To Hard Disk Mode" from the menu.
In the setup window, enable the snapshot mode.
Enable saving of meta data if needed.
Select the destination folder on your hard disk.
Select the desired file format of the image(s).
Click "Apply" or "Ok" to finish the setup
Now you can save the current image by pressing the space bar. Make sure, that the ImpactControlCenter main window is selected.
Current status information will be visible in the Output tab of the Analysis Area (The Big Picture)