Grey line at side of totals columns (?) [resuelto]

Can anyone tell me what the grey line represents next to the totals columns  on the 'My Collection' page please?

 It shows that the list it is alongside only shows the first few [seven] results. 

Dragging that bar further down shows more [another four or five] results.  

Then that last result displayed for each will be called  Others  or similar. 

 Found the page, under the  My collection  tab at the top of any page. 

https://en.numista.com/vous/index.php 

 Here is mine 

 which that first picture shows [pink arrow] on the very right of the page is 

the grey bar to show how far the page the view is - so is same principle. 

 The second picture is when on my page I then had dragged the two bars, 

alongside the first 7 lines, to show I have 4 others [pink rectangle] there.  :) 

It's called a scroll bar.

Obvious !!!  Thanks all.  Bit of a senior moment going on there.