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SpanFromBoth

SpanFromBoth
is a symbol that can appear at a particular position in a Grid or related construct to indicate that the corresponding position is occupied by a spanning element that appears above and to its left.
Span throughout a 2×2 block:
Set a red background throughout the spanned region:
Span throughout a 2×2 block:
In[1]:=
Click for copyable input
Out[1]=
 
Set a red background throughout the spanned region:
In[1]:=
Click for copyable input
Out[1]=
Graphics will default to filling the available space:
An explicit ImageSize setting will prevent this behavior:
To span across both rows and columns requires appropriate use of SpanFromBoth:
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