Grey Line When Readings pdfs

Hi everyone,

just bought an m92.

When I check the firmware version is says:
1.8 20121220

so I guess that must be the latest.

Regarding the grey dotted line that shows in the pdfs when reading, can it be turned off ?

I know it has something to do with pdfs where you have zoomed in and the grey dotted line shows you where you were before you moved the page focus.

Just wondering.