1. A method for supporting input of one or more execution parameters of predetermined software in an input field, comprising: receiving input of a text character string including one or more execution parameters in the input field displayed on a display device; determining a selection type in response to a user selection of a part of the text character string; displaying on the display device one or more execution options of the execution parameters depending on the determined selection type; and in response to the user selection of a desired execution option, transforming said text character string to include the desired execution option selected and displaying the transformed text character string on the display device.