In order to sign a pdf document within the UBIK mobile application you need an installed pdf reader on your mobile device.
[[File:Signing_01.png|thumb|50 px|picture 1]]
[[File:Signing_02.png|thumb|50 px|picture 2]]
The signing of a pdf document will be explained in following steps:
[[File:Signing_01.png|thumb|50 px|picture 1]]
1. Open an existing pdf document underneath of the assigned object
[[File:Signing_02.png|thumb|50 px|picture 2]]
2. Click on any position in the pdf document in order to see the menu bar