How to do column editing in vim?

To edit a column, follow these steps:

1. Stand on the beginning of the column
2. Press Ctrl+v, then mark across the column you want to edit.
3. Press Shift+i to insert text at the beginning of the column, Shift+a to append text, r to replace highlighted text, d to delete, c to change… etc.
4. Hit ESC when done.

I think people (me) sometimes map the column editing keys to Ctrl+Q so it won’t collide with visual select line (V) or paste-text if you mapped it as such.