Projection files (PRJ) do not display in the Coordinate System folders

Description

Projection files, which should be listed in the Coordinate Systems directory, do not display in the following locations:ArcToolBox Define Projection Tool
ArcToolBox Project ToolArcMap > Display XY Data > Edit button > SelectArcMap > Data Frame Properties > Coordinate System tab > Predefined folder

Cause

The check box labeled 'Coordinate Systems' located in ArcCatalog > Tools > Options > General tab, in the lower window has been unchecked.

Solution or Workaround

1. Open ArcCatalog > Tools > Options > General tab.
2. In the lower window on the General tab, check the box labeled 'Coordinate Systems'.