Everyone knows you can use SHIFT + [Left/Right Arrow] to highlight text. But you can also use ALT + SHIFT + [Up/Down/Left/Right Arrow] to select a block of text or even make a vertical selection to insert a block of text on multiple lines. Or you can use ALT + [Mouse Drag] to make a block selection with your cursor.
Notepad++ works the same way. Every once in a while, I’ll run into a scenario in some tool which doesn’t implement Alt key functionality—especially certain non-Microsoft platform database products—and it will hurt a little bit inside.