4 Editing part programs
4.3 Basic Editing Functions: Typing, Cursor Moving, Delete, Insert, Select
The editing gets started as the effect of action menu key 
.
Basic editing functions are implemented with the help of the following keys:
–characters: <A>, <B>, ... <Z>. By their use capital letters can be typed in.
–Shift button: 
. In case the key is kept pressed down and another key is pushed
meanwhile, the second character indicated on the key is entered. Should letter keys be pushed and no secondary character shown on it, small letters are typed
–digit keys: <0>, <1>, ...<9>
–space: 
– decimal point:
– minus character 
– move cursor up, down: 
,
–move cursor right, left: 
, 
–new line (s): (Enter) 
–go backwards and delete: (Backspace) 
–delete: (DEL) 
–insert: (INS) 
–page up: (PgUp) 
–page down: (PgDn) 
Typing
Characters, signs and the space can be entered uninterruptedly by pressing down the appropriate key or keys. The place of input is where the cursor points at.
Word wrap
Should a word (a string between two spaces) exceed the length of the given line while typing the editor displays the whole word in a new line.
New block
During program editing termination of a block is performed by pressing <ENTER> key 
due to which line feed occurs and at the same time character s is adjusted to the end of the terminated block automatically. As the effect of the key the cursor goes to the beginning of the next line and the input of a new block can be initiated.
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