Desktop Image Viewer
From Xojo Documentation
Contents
The Image Viewer control provides an area in which you can display a BMP or PNG image on Windows and Linux or a JPG or PNG image on macOS. You can easily program the Image Viewer control to accept a dragged picture.
Properties
Image - The image to display.
Usage
Do display a picture in the Image Viewer, simply set its Image property. This code in a Button's Action event assigns a Picture that is included in the project:
ImageViewer1.Image = MyPicture
See Also
DesktopImageViewer, Picture classes