The system comes with a very powerful screen paint utility which allows the user to layout the text and 'holes' in pretty much whatever order they wish. This utility comprises of two main modes, INPUT and FUNCTION plus a subsidiary mode ENTRY. In INPUT mode, the characters input will overwrite anything that may already be present. In addition the paging keys may be used for tabbing across a line and the backspace acts non-destructively. Where the user wishes to edit the existing screen, hitting the EXIT key will take them into FUNCTION mode.