Character information processor for printing characters

摘要

A character information processor which can be applied to a tape printing device. The character information processor is provided with a read-only memory in which a table containing the levels of alternatives of a menu hierarchical structure set correspondingly to each edition function is stored. When an edition level is selected by an operator by keying, only edition operations, which are available at the selected edition level, are displayed on the screen of a display unit as choices. An example of the function of editing a character string is a function for enabling the restoration of a text, on which an edition operation such as an input operation and a deleting operation has been once performed. This function is implemented by providing a restoration buffer in the processor and by storing a character or a character string, on which an operation is performed, and a cause-for-restoration parameter representing a kind of an operation in the processor each time when an operation such as an input and a deletion is performed, and by performing a restoration operation according to the cause-for-restoration parameter.