delete change displayed in meld - dif viewer

meld is a diff viewer programmed in Python using pygtk+, which I use in mercurial as a diff viewe.

This tools allows directory and file comparing.
During file comparing there are the arrows in the middle to move changes
from one side to the other like in the following image from meld:

To be able to remove a change from a file, you just have to press
<Shift> and the arrows change to an "x", which removes the change from the file.

By pressing <Ctrl> where the same line is changed in both files like the
blue colored one above, there are Arrows up and down on both sides, which
allow to copy the change above or below the change in the other file. 

The whole file can be copied from the directory-view my selecting the file and use the context menu. This contains a "Copy right" or "Copy left" and "Delete"

thanks to the guys behind meld.