Examples
Async
Upload new image
Default async upload.
Upload and edit existing image
With manual remove button.

Edit existing image only
With altered label values.
Note that the "edit", "download", "remove", "upload" and "rotate" labels are invisible as Slim uses icons for these buttons. It will show the button title when hovering over the button.
Read more on labels in the documentation

Upload and remove images
With remove image from server script.
Sync
Accepts only jpegs and gifs.