Say I have the following 2 files open in Notepad++
Is it possible to copy the text on the right and paste it into the left, so that I will end up with
D over (etc..)
Yes. Do a block copy/paste.
Hold down Alt while selecting the text to copy and copy it. Then hold down Alt while selecting where you want to copy to in the destination file. Don't select any characters--just drag the cursor down so it flashes on multiple rows. Then paste the text.
Vertical/block editing can also be accomplished by holding Alt+Shift along with the arrow keys on your keyboard.
Note: This method can also be used to input text on multiple rows simultaneously. You may also access this via the edit-menu as shown below. Column Mode will simply tell you the keyboard shortcut to use. Column Editor will insert one or more characters (or numbering) starting at the cursor and in all subsequent lines, until you reach the end of the file.
Yes, sort of - use column operations.
Unfortunately it won't handle spaces quite right for your example. You would need to put a space at the end of the copied block on each line. Luckily you can use column operations again.
This won't work if the text you paste in is different lengths on each line, though, because you can't select a single vertical line to insert the spaces to. So I would put a space on the end of each source line before copying -