When I normally select multiple cross selection it is possible pressing control.
But, When I'm running Pickobjects selection method I'm not able to do the same.
The previous selection is getting out while any new cross selection is done.
Is there any way to achieve multiple cross selection within pickobjects selection method?
Sorry, I am not aware of any such possibility.
You could file a wish list request for it in the Revit Idea Station, if it is important and you are willing to wait for the development team to get around to it once the priority (number of votes) is high enough.
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