Using the Acorn Image Browser
This will show you how to browse through image files and how to peek into other applications.
There are 2 ways to do this.
The first method is to go to File ▸ Open Folder (Shift+Command+O).
Choose either a folder that contains images, or an application.
Or, you can hold Option+Command and drag your file or the icon of the application and drop it on top of the Acorn icon in your Dock.
Either way, the image browser will appear in Acorn with all the images contained within the folder or application.
