... each computer where Revit is installed; Revit stores each pattern internally, in each project.Before modifying PAT files, always make a copy of the file you intend to use in Revit; you don’t ... material used in Revit, you can define a surface pattern and a cut pattern . For simple parallel hatches and crosshatches, you can use the patterns already supplied in Revit or you can ... Your Custom FamiliesMany new users of Revit are unsure where to store custom created families. It isn’t advisable to savethem in the folders provided by Revit, because you may lose track of them...