ScreenThumb

Right aspect ratio dfs dfs dfs dfs dfs dfsf ds dfs fdsdfs dfs dfsdfs fd sfs d

Wrong aspect ratio

Bobscreen thumbnails, so the aspect ratio is corrected.

{{ScreenThumb|PC8801 Boot.png|Right aspect ratio}}

Not quite as smart as the standard Mediawiki one for File, so you might need to use other arguments to make sure screenshots don't dominate:

| align=
| width=
| height=
| forcewidescreen=