Allen-Bradley 1747-PBASE, Руководство по программированию

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1 Publication 1746-PM001A-US-P
Chapter
4
Editing a Program
This chapter is designed to help you understand the file editing features available
with your BASIC Development Software. It provides a general description of the
features so you can apply them as needed when you begin writing your own
programs. major topics include:
•
simple editing techniques
•
search operations
•
block operations
•
text formatting
•
advanced editing features
Using Simple Editing
Techniques When you select
Edit mode
from the Toplevel menu, the main menu appears and
a window opens. This window, the A window, is immediately available for file
editing, or an existing file can be opened and loaded into it. At that point, your
keyboard provides you with some simple editing techniques.
The following keys perform as described while editing text:
IMPORTANT
If using the keys on the numeric keypad of your personal
computer, make sure you have turned your
[NumLock]
off.
Table 4.1 Key Functions
Keys Function
[right arrow]
Moves the cursor across the screen to the right.
[left arrow]
Moves the cursor across the screen to the left.
[up arrow]
Moves the cursor up the screen.
[down arrow]
Moves the cursor down the screen.
[Ctrl-right
arrow]
Moves the cursor one word to the right.
[Ctrl-left arrow]
Moves the cursor one word to the left.
[Home]
Moves the cursor to the beginning of a line.
[End]
Moves the cursor to the end of a line.
[PageUp]
Scrolls the screen up by one full screen.
[PageDown]
Scrolls the screen down by one full screen.
[Ctrl-PageUp]
Scrolls the screen to the top of the page.
[Ctrl-PageDown]
Scrolls the screen to the top of the next page.
[Ctrl-Home]
Scrolls the screen to the top of the file.
[Ctrl-End]
Scrolls the screen to the end of the file.