# Set a path relative to $UserBaseDirectory in the option inspector Is there a way to set a setting in the option inspector to a path that is relative to some global Mathematica variable? I'm trying to set up a default stylesheet by setting DefaultStyleDefinitions to a style sheet located in $UserBaseDirectory/SystemFiles/FrontEnd/StyleSheets. I need the setting to be independent of the path to $UserBaseDirectory because I'm using the same settings on different machines where my user's directory has different names. But setting it to a value containing $UserBaseDirectory didn't work.

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I just found out that I can use a path like "~/Library/Mathematica/SystemFiles/FrontEnd/StyleSheets/My Default.nb" for that setting, which solves my problem as I only need this setting to work on OS X. But I would still be interested in an answer to my question. –  Feuermurmel Aug 13 '13 at 8:21

Mathematica looks for style sheets in the folders specified by StyleSheetPath and this already includes
FrontEndFileName[{\$UserBaseDirectory, "SystemFiles", "FrontEnd", "StyleSheets"}]

on my system. So just change the setting of DefaultStyleDefinitions to the name of your style sheet.
The setting for StyleSheetPath`shows how to construct file names from global variables in a cross-platform manner.