It is possible to display two tools at the same time. By default, XMLmind XML Editor displays both the Edit tool and the Attributes tool. If you don't like this layout or if your screen resolution is too low to allow this, simply click on the “tear-off” dashed line found in the Edit tab. This will move the Edit tool back to the pane containing all the other tools.
More generally, clicking on the “tear-off” dashed line found in a tab may be used to split the tabbed pane in two parts and/or move a tab from one part to the other. Of course, the divider used to separate the two parts may be dragged to resize these parts.