The Calculator tool supports IntelliSense feature to help you easily insert the expressions. It facilitates automatic expression completion with contextual suggestions.
IntelliSense is available when you are creating the expression in the Calculator window and gets invoked as you type CTRL + Spacebar on your keyboard. IntelliSense provides quick access to the list of functions and expressions. The list is filtered if you continue typing characters, based on the context.
For example, if the input file is classified, intellisense brings up the list of all classes in the file as you type "=" in the conditional expression and press enter.
If you have multiple open files, intellisense will bring up the list and help you in selecting the required file.