On How To
OnePlus has baked in the ability to take longer screenshots from pages/apps which scroll vertically. This lets you take a long screenshot which covers all the information divided over multiple pages. Here simple demo for how to take long screenshots on your one plus 5. Very cool and useful feature in one plus.

Applies to: OnePlus 3 and 3T running Oxygen OS 4.1.0 or higher. The features are also available in Beta builds starting from 3.5.5.