Selecting and Navigating

There are numerous ways to navigate through an object, and to set the insertion cursor, textual selection, and structural selection. These are illustrated in the following subsections:

• Insertion-Cursor Motion
• Setting the Textual Selection
• Scrolling
• Textual Search
• Structural Motion
• Getting to Optional Placeholders
• Setting the Structural Selection
• Structural Search

These sections may contain more details than you wish to know now. Since they do not change the code in ways that interfere with the rest of the tutorial, you may safely omit sections. At this time, unless you have been experimenting, the *untitled* window will contain:

--~----------------------------- 

with <expanded_name>; 
procedure <identifier> is 

 <basic_declarative_item> 

begin 
  if (X or Y) and Z then 
   A := 1; 
   B := 2; 
   C := P and Q and R; 
   D := 123_456_789; 
   E := 12_345.678_9E+12; 
   F := (X + Y) * Z; 
   <statement>
  end if; 
end ; 

--~----------------------------- 

If you have been experimenting, there may be several unimportant differences:

1. The optional placeholder <basic_declarative_item> may be missing.

2. The structural selection may not be positioned at the <statement> placeholder.

Optional placeholders can be removed by clicking the mouse there (if the placeholder is not already structurally selcted), and then moving elsewhere.

If the <statement> placeholder is present, click the mouse anywhere else in the procedure.

Remove the <basic_declarative_item> placeholder by clicking the mouse there, and then clicking elsewhere.