# scan

- H52: [Scanner](https://wiki.math.uzh.ch/public/books/public-wiki/page/scanner-h52) at the Windows computer.
- Copy machines on Floor 'J' and 'K' (you need a copy machine code - not for students).

## Remove background

To remove the background color 'white' (or similar to white): In Thinlinc, please save the image, open the file manager, and choose 'Remove background'.

[![removebackground.png](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/removebackground.png)](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/removebackground.png)

This is especially useful for scanned signatures to paste to a document.

## PDF / TIFF

```

# PDF > TIFF
convert source.pdf new.tiff

# TIFF > PDF
convert source.tiff new.pdf

```

### Android: Create PDF from picture

- App: Google Drive
- [https://support.google.com/a/users/answer/9308884?hl=de&co=GENIE.Platform%3DAndroid](https://support.google.com/a/users/answer/9308884?hl=de&co=GENIE.Platform%3DAndroid)