How to scroll up and down in a terminal with PgUp and PgDn keys?

In gnome-terminal, lxterminal and mlterm under Lubuntu 16.04, when pressing PgUp nothing happens, and the symbol ~ appears when PgDn is pressed, but the information won't scroll up or down. This is not the case for navigators and text editors, where they behave as expected. How can this be changed for a terminal?