In the upper right is a picture preview. This preview is only available if exactly one picture is selected in the list. Above the picture preview the size of the shown picture is displayed as horizontal pixels * vertical pixels (e.g. 640*480). If this size corresponds to one of the usual screen sizes, its designation follows the pixel values (e.g. 640*480 13”RGB  or 1152*870 Two Page ).

If there is currently not enough memory available to display the picture, the preview will just gray out and the size reads “Not enough memory”.

If you double-click the preview, the picture will be shown in its real size, centered on the screen. Just click it or press any key to return to the control panel.

The preview itself has two modes, “Full Size” and “Relative Size”. You can toggle between them by checking/unchecking the “Full Size” check box.

Full Size :

In this mode the picture is displayed as big as possible in the preview frame while retaining its vertical/horizontal ratio. If the picture is actually smaller than the preview size, it is shown in its real size and the border is “greyed out”. Such pictures are usually not too useful as a startup screen but are quite common when importing from applications.

Relative Size :

This mode is especially useful if you want to know how the picture looks on your screen. The outer frame represents your screen (and yes, it adjusts according to your screen dimensions). The picture itself is shown in its size relative to your screen dimensions while the area not occupied by the picture is shown in grey (as it will at startup). If everything just looks grey (except for a tiny speck in the center), the picture is too small to be useful for your screen.

If the picture is actually larger than your screen, both the screen rectangle and the whole picture are scaled down and the picture borders outside the “screen” are drawn in grey. Additionally the screen rectangle is greyed out.