The Edit menu commands Cut (Cmd-X), Copy (Cmd-C), Paste (Cmd-V), and Clear work as usual, and are all undoable with Undo (Cmd-Z). For Undo to work, however, the cursor must not have been moved after the last change. Undo is disabled when the last change is not undoable.
Paste has no effect if it would increase the document size over the 32K char limit.
The shape of the blinking caret (where typed text gets inserted) depends on the current font and the direction of the "primary script". As mentioned in the section entitled "Creating Documents", the primary script direction is the one specified by the Orientation selection (Left to Right or Right to Left) from the Text menu. As long as the script belonging to the current font has the same direction, the caret appears as the "I-beam" cursor. When the font is changed to a script having the opposite direction, the caret splits into two half-sized carets, a high one and a low one, which together enclose the inserted text flowing in the opposite direction. You should choose the orientation correctly to correspond to the bulk of the text. Carriage returns in the dual caret-enclosed texts are particularly problematic, and may cause erratic behavior in insertions and line breaks.
The extended keyboard keys work as follows: Home and End move the cursor to the beginning and the end of the file, respectively, scrolling the text if necessary to keep the cursor in view. Page Up and Page Down scroll the text backward and forward a windowful. The arrow keys move the keys in the direction of the arrow, irrespectively of the script direction. Forward Delete deletes the next character in the script direction. (The Delete key on the standard keyboard backspaces over the previous character in the script direction.)
