custom-reevaluate-settingcustom-reevaluate-setting is a compiled Lisp function in `
custom.el'. (custom-reevaluate-setting SYMBOL) Reset the value of SYMBOL by re-evaluating its saved or standard value. Use the :set function to do so. This is useful for customizable options that are defined before their standard value can really be computed. E.g. dumped variables whose default depends on run-time information.