Release Notes 1.15.10
From The Battle for Wesnoth Wiki
Contents
New Content
Command history for in-game consoles
Now it's possible to browse the command history with up/down keys when using in-game consoles, such as one in debug mode. If the player jumps to the previous command with some unenterred text in the textbox, it will also be stashed. Chat messages, however, won't be stored like this to avoid spam.