I worked it out after seeing this comment[1]. A screenshot like that placed close to the file upload box may help. [1] https://news.ycombinator.com/item?id=568

I worked it out after seeing this comment[1]. A screenshot like that placed close to the file upload box may help. [1] https://news.ycombinator.com/item?id=5683162 https://news.ycombinator.com/item?id=5683162