The following How-to topics deal with expressions in Magic xpa:
How Do I Format an Expression in the Expression Window?
How Do I Automatically Complete the Name of a Typed-in Function?
How Do I Set the Colors of the Colored Elements in the Expanded Expression View?
How Do I Get to the Help Page of a Function?
How Do I Manually Expand the Expression Line to Make it Easier to Edit Large Expressions?
How Do I Syntax Check an Expression while in Wide Mode?
How Do I Enter Line Breaks into String Values?
How Do I Set an Expression Directly in the Task Editor?
How Do I Open the Variable List from the Expression Editor?
How Do I Open the Functions List from the Expression Editor?
How Do I Find Where an Expression Is Being Used?
How Do I Reuse Expressions Within Another Expression?
How Do I Construct and Evaluate an Expression at Runtime?
How Do I Repeat an Existing Expression in a Task?
How Do I Find All Unused Expressions?
How Do I Clear All Unused Expressions?
How Do I Define a String Value in an Expression?
How Do I Avoid Creating Duplicate Simple Expressions?
How Do I Automatically Clear All Unused Expressions?