Try zooming way out and see if the picture has wandered off to another part
of the document. It may have guarded formulas in it's ShapeSheet
definition, especially if the shape is part of Visio's included content.
Some of these shapes have special "smart" behavior that goes awry if users
try to ungroup them.
A simple method is to just go inside the group.
- Select the shape
- Choose Edit > Open "group name"
- You'll get a new window that is inside the group
- Select the shape with the shadow and de-apply it, or delete any shadow
shapes.
- You might have trouble doing this, as some shapes have their sub-shapes
locked/protected
A more compllicated work-around is to "dummify" the shape:
- Copy the shape: Ctrl + C
- Edit > Paste Special
- Choose Enhanced Metafile
- Youl'll get a new copy of the shape, but this is simple vector-data, and
no longer a smart shape
- Ungroup
- The picture shouldn't disappear.
- Choose the parts you want to keep or modify, delete the rest.
- Warning: when you paste-as-metafile, you might get two sets of shapes:
outlines and fills. You can delete
half of them, then just re-apply the line or fill styles to the remaining
shapes. No sense in having two of every shape...