Slipstream will automatically activate the live view of the attached camera so that you can see the subject in the Viewer. Place the material on the stand and click/press on Capture. The captured image will now show up in the Browser on the right.
If you need to check whether the live view or captured image is well-focused and sharp, you can zoom in by clicking/pressing on the plus loupe icon at the top right corner under the Viewer. Click/press on the minus loupe icon to see the entire live view or image in the Viewer again. As in many touchscreen-based applications, the basic actions such as pinch, swipe, and double-tap are also supported for zooming in/out or toggling between 100% and Fit magnifications.