Menu select File > Settings Popup Keymap > Editor Actions > Down (, Left, Right, Up) select - mouse left double click or right click > Add Keyboard Shortcut click > (number keypad) Down(, Left, Right, Up) Select > OK > Apply, OK 참조 : intellij-support.jetbrains.com/hc/en-us/community/posts/206345169-Scrolling-with-keys-on-numeric-keypad-with-num-lock-off
