in addition to the ability to mark a character, a word and lines, windows terminal also provides to mark a block

A marking mode that can be particularly useful for tabular work. It is allowed to mark and edit information that is directly adjacent to each other, without including the entire lines in the marking and editing.

The Alt key is used for the block marking. Position the mouse pointer at the beginning or end of the block, press the Alt key together with the left mouse button and drag the marker to the other end of the block. The selected block is automatically copied to the clipboard.