11. A computer-implemented method as in claim 1 , wherein detecting that the selection of content includes part of a grouping of related content involves detecting that the selection of content includes a portion of first tagged content and wherein providing the second visual indication involves providing the second visual indication in a region exclusive of the first visual indication to indicate a portion of the first tagged content not included in the selection of content, the computer-implemented method further comprising: detecting that the selection of content includes a portion of second tagged content; and providing a third visual indication in a region exclusive of both the first visual indication and the second visual indication to indicate a remainder portion of the second tagged content.
11. A computer-implemented method as in claim 1 , wherein detecting that the selection of content includes part of a grouping of related content involves detecting that the selection of content includes a portion of first tagged content and wherein providing the second visual indication involves providing the second visual indication in a region exclusive of the first visual indication to indicate a portion of the first tagged content not included in the selection of content, the computer-implemented method further comprising: detecting that the selection of content includes a portion of second tagged content; and providing a third visual indication in a region exclusive of both the first visual indication and the second visual indication to indicate a remainder portion of the second tagged content. 12. A computer-implemented method as in claim 11 further comprising: differentiating the first visual indication, the second visual indication, and the third visual indication on a display screen based on at least one of: i) different colored regions on the display screen, and ii) different degrees of shading on the display screen.