deletions | additions       diff --git a/Specifications.tex b/Specifications.tex  index 0071c77..2438281 100644  --- a/Specifications.tex  +++ b/Specifications.tex 
...
\item Ensure only physical touched are recognised and acted upon by the phidget  \item Ensure that no electrical inteference affects the phidget whilst in operation  \item When circular touch is being operated, ensure that no other device can be used  \item Ensure that when slider goes outside the threshold, the keys for zoom controls are released  \end{itemize}  \subsection{Slider for Zoom Control}