The following option can be used at the time of starting.
A character code is specified by CHARSET. Priority is given to this specification over an environment variable.
The history of a file is specified. The range of NUM is 0 to 10.
When a file is opened, it is the line number in which a caret is located. It is enable only in the file opened at the time of starting.
When there is no file opened at starting with ON, a file is created. With OFF, a file is not created.
The width and the height of a window are specified.
Usually, the program is the specification which is not started simultaneously. If it is ON, two or more programs will be started. If it is OFF, the program started doubly will pass an argument to the already started program.