I've taken a more detailed look at the tabs. I like the clean look and the functionality very much.
To make multi-selecting tabs perfect: - I would like to be able to shift-click to multi-select; - if I command-click on a already selected tab, I would like it to be removed from the set of selected tabs; - I would like the horizontal line below the selected tabs to go away, to make clearer that I'm looking at multiple tabs; - when I resize a column, I would like the relative size to stay when I add another one; - I'm not sure making the order of the panes dependent on the order in which the tabs are selected is a good idea, especially when you allow reordering tabs by drag-and-drop; I think position based ordering is easier to understand; - one way of showing what pane belongs to which tab, would be to draw a thin colored line from the tab to the pane; there is some vertical space you could use for that; - another would be to put a (opaque) icon with an arrow (in a circle?) pointing at the center of the pane over the tab. Stephan
