Session Customization
The Wolfram Language allows almost every aspect of sessions to be customized, under full programmatic control.
$Pre — function to apply before each input is processed
$Post — function to apply to each output
SetOptions — globally set options for functions, notebooks, and the front end
On , Off — switch messages on or off
SetDirectory — set the current directory
$Path — list of directories to search for files
Once — evaluate any expression once only within a session
Locale & International Customization »
$TimeZone ▪ $CharacterEncoding ▪ $Language ▪ $DateStringFormat ▪ ...
Session History Customization »
$Line ▪ $HistoryLength ▪ $OutputSizeLimit ▪ ...
Global Computation Settings »
$RecursionLimit ▪ $Assumptions ▪ $MaxExtraPrecision ▪ $MinPrecision ▪ ...
Low-Level Customization
$NewSymbol ▪ $NewMessage ▪ $PreRead ▪ $SyntaxHandler ▪ SystemOptions
Evaluation ▶ Dynamic Updating Enabled — switch dynamic content on or off
Batch Processing »
$Output ▪ $Urgent ▪ $Epilog ▪ $IgnoreEOF ▪ ...
Session Initialization »
InitializationValue — persistent settable value initialized when sessions are started