Marking blocks of text

There are many ways of marking text in a file that is being edited. Some are described below.

Marking a Block of Text with the Mouse

Position the mouse pointer over the character that is to start the block.
Right click and hold the mouse button.
Drag the mouse pointer to the to the end of the block of text you want and release the mouse button. The block is now marked according to the default blocking mode in effect.

Marking a Block of Text using the Keyboard

Use the cursor keys to move the cursor to the character that will start the block.
Press Alt+B.
Move the cursor to the end of the block of text.
Press Alt+B again. Text between the two points is marked.

Marking an Entire Line of Text

To mark all lines between the line selected above and another line inclusive:

Move the cursor to the last line of the group of lines you want to select
Use the steps described above to mark that line. All lines between the first and second lines selected are marked.

Marking a Rectangular Area of Text

Place the cursor on the character position defining one corner of the area you want to mark.
Select Edit from the main menu bar.
Select Select.
Select Rectangle. The first corner of the rectangle is marked.
Place the cursor on the character position defining the opposite corner of the rectangular area of text you want to mark, and repeat steps 2 to 4 above. The rectangular area between the two corners is marked.