Commodore Plus 4 - Page 116

104 The Built-in Software
To set the boundaries of a block for deletion, follow these steps:
1. Move the cursor to the last line of the block.
2. Use the SP (Set Pointer) command to set the end of the block.
3. Move the cursor to the first line of the block.
4. Issue the DB (Delete Block) command to delete the block.
If you want to move the block elsewhere before you delete it, use the CB
(Create Block) command to create the block, and the IB (Insert Block) command
to insert the block at a new location. Then follow the preceding instructions to
delete the block.
DF WP, SS
Removes a file permanently from a disk. Use the DF (Delete File) command
only when you no longer want to keep a copy of the file.
To delete a file you previously saved on disk, issue the DF command and type
the name of the file when the prompt DELETE FILE: is displayed on the
command line at the bottom of the work area. When you press RETURN, the
disk takes a few seconds to remove the file from the disk. This command operates
like the SCRATCH command in BASIC.
You can verify that the file has been deleted by viewing the disk catalog, which
you access by issuing a CA command.
DL WP
Lets you delete the line of text where the cursor is currently located. You can
delete a line of text anywhere in the work area. After you delete a line, the lines
beneath are moved up to fill in the space left by the deleted line.
To delete a line, move the cursor to the line you want to erase and issue the DL
(Delete Line) command. You can delete more than one line by repeating the DL
command, by issuing a Q Q command after a DL command, or by using the DB
(Delete Block) command to erase a group of lines.
EP WP
Cancels a pointer set by the SP (Set Pointer) command. Whereas CP (Clear
Pointers) removes all pointers currently set in the work area, EP (Erase Pointer)
erases only one.
To use EP, move the cursor to the line where the pointer you want to erase is
located, then issue the EP command. The pointer on the current line is deleted,
but other pointers in the work area are unaffected.