Multiple Scrollable elements on single page

[GitterHubber]

Many webapps like WhatsApp Web or Facebook Messenger have multiple scrollbar elements on a single page typically there is a left pane with user list and there is a centre pane where all the messages and chats of that user are listed.
I would like to get a scrolling screenshot of the chat scrollable element, but it seems the extension tends to take only the user pane screen shot and then stop.

Is it possible to select the which scrollable element to screenshot?

[aeltee]

Bump for this. In these cases, I have had to resort to zooming out really small so the entire page is visible on the screen (the part of the page that doesn't get scrolled by the extension), which kills the resolution. Strangely, I noticed that with different links of the same website (which have the same 2 scrollable elements in the same exact location/setup), sometimes the part of the page that didn't get scrolled before does get scrolled by the extension as I desired. I couldn't see a pattern in when one of the scrollable elements gets scrolled rather than the other. I see this issue hasn't been addressed since first submitted in January but I thought I'd chime in.

[Chicken3gg]

Same for me

I want the red area, but the area on the left side is scrolled and captured.

@aeltee don't you think it should be possible to specify the one frame that you want to capture?
I mostly don't need the whole website, but at least an area that need to be scrolled to be captured entirely.