Actually I guess the two Boxes wouldn't be different colors because SSC wouldn't know if I was going to pre-select, or grab, the object.
Anyhoo... If I activate a "grab object" capture, then hover my cursor over a window (eg the above ex), different items get outlined with the Red Box (menu items, status bar, etc), as SSC is offering to grab them. When I move the cursor to the edge of the window, the Red Box "lets go" of the inner object and Boxes the entire window.
It occurred to me that when I need to capture an Object, I likely will emphasis part of it with some SpecialFX tool AND that the thing I'll want to emphasize will likely be one of those objects that SSC was JUST A SECOND AGO offering to grab!
So my proposed idea could work like this...
Options are set to:
Ctrl+Click in Red Box = capture object.
Alt+Click in Red Box = remember that area of the image and have it automatically selected when the SSC main window opens.
User order of operations:
1. Activate Object grab.
2. When hovering over the area I will be emphasizing (or de-emphasizing), Alt+Click.
3. (SSC is still in Red Box object capture mode) Alt-Click other areas if there are to be multiply-selected areas.
4. Then Ctrl+Click the larger object.
5. When the image is initially opened in the SSC main window, the "alt+clicked" items are accurately selected. (Note that any pre-selected area outside of the final capture would be discarded.)
I supposed this could also be achieved by adding a 5th button to the post-object-capture dialog. Currently there is a [Save selected object and choose another] button. You could add a [Save selected object and highlight/pre-select an area of it].
Note that I would not call this a critical feature... Obviously it's not difficult to accurately select part of an image POST-capture. It would be clever though. And I don't think that there are any other screen capture utilities that do this... (I'm familiar with most of them)