There are 80 columns or 132, depending on the terminal's margin setting. Any messages embedded in the screen frame are also cleared. Multiple items can be used separated by commas. You can also replace the cleared area with a box by using the BOX option. The following example clears the screen and specific areas of the screen.
Text is printed to the screen.
Rows and areas of the screen are cleared in various ways. Lines 4 and 5 are cleared first. 10pc Parts of lines 8 and 9 are cleared and shown in reverse video. Parts of lines 12 thru 15 are cleared and the area is boxed. A user tends to focus on items which stand out.