What are these two keys, ⇞ and ⇟?

Question

I see keyboard shortcuts in the menu of Brackets. There are two symbols that look like up arrow and down arrow, could anyone tell me what they are?

Answer 1

Those are the page-up ⇞ and page-down ⇟ keys (on keyboards without them, use fn-Cursor up/down). For a list of other common key symbols, see this answer.