Scrolling commands The scrolling commands roll the screen up or down by one display line. The cursor is left in the same position within the file, so it will move within the display. If the cursor is pushed off the screen by the scroll command then it is moved back into viewin an appropriate manner. The scroll commands are useful for displaying a line which is just beyond the screen limits with few keystrokes. Ctrl Z Ctrl W Scroll the display up a line. Scroll the display down a line. Text deleting commands The text deleting commands remove text from your file. You cannot a delete command as you can with the line editor. Note that the block command also deletes text.
Ctrl K Y Ctrl G Del , Grab, or delete the character under the cursor. , Delete one character backward (the last character typed). Delete from the cursor to the start of the next word. Delete the entire current line. Delete from the cursor to the end of the current line. Delete from the start of the current line to the cursor. Ctrl H Bs Ctrl T Ctrl Y Ctrl Q Y Ctrl V The command uses the same word terminators as the and cursor movement commands above. Ctrl T Ctrl A Ctrl F Undo commands Whenever any text is deleted, it is placed in one of ten undo buffers. The undo buffers can be reviewed with . Typing to inserts the contents of an undo buffer at the cursor. is shorthand for .
The undo buffers work on a last-in first-out basis; when some text is deleted from the file, the oldest entry in the undo buffer is removed to make space for the new entry. This undo facility is new in Version 4. Ctrl Q U Ctrl U 0 Ctrl U 9 Ctrl U U Ctrl U 0 Block commands With the block commands you mark out a block of text and then move it, delete it, copy it or write it out to disk. The block is marked out by putting the cursor onto the first character of the block and entering ; the cursor is then put at the next character beyond the end of the block and is entered.
These two operations may be reversed, but the beginning marker ( ) must always beclosertothefrontofthefilethantheendmarker ( ). Whenboth markers are correctly entered the marked block is re-displayed in a different colour, or with Ctrl K B Ctrl K K Ctrl K B Ctrl K K Edit: The Screen Editor User Tutorial Manual Page 49