Many have posted in the past about the ability to minimize attribute tables in ArcMap (current release 10.3). A few links are here: , ,
The problem remains in the first release of ArcGIS Pro 1.0.0. Close, Maximize and Restore options are all present, but no Minimize. Justification for this functionality has been given numerous times in other posts since 2010. Please consider bringing this basic functionality back into both products.