Is there a way to let user resize the sub-interface in parent interface when using the app?

Hi community members,

So the requirement is:

When business user using the site, one of the interface has the two column layout, left sub-interface showing the uploaded document, right sub-interface is some summary info. The user want to able to adjust the size for the two sub interfaces. For example, there should a line between left sub-interface and right sub-interface, when user drag the line to right, the left sub-interface occupies more area of the screen and the right sub-interface occupies less area.

I have did some research and it seems Appian doesn't support this feature. Please give some advice if I missed some thing.

Thanks.