Scroll bar on Multiple perspectives page

Whatever size the page or the video is, there is always a scroll bar on the right side of the window of a Multiple perspective page.
I am trying to fit all my content in the default sized window (600x800) so no page has a scroll bar. But this page seems to have one by default.
How can I get rid of that?

EAL écrit: Whatever size the page or the video is, there is always a scroll bar on the right side of the window of a Multiple perspective page.
I am trying to fit all my content in the default sized window page has a scroll bar. But this page seems to have one by default.
How can I get rid of that?

try to go to a check point in your pc settings ,,, windows every now and then make a checkpoint that restore the information to that point in that exact time