One interesting feature is a second margin at the 35th character, allowing lines to be limited between the left side of the screen and that point for margin 0, or that point and the right side of the screen for margin 1. This is useful for mixing graphics and text, or displaying two columns of text. Switching between the columns was accomplished by moving to the very last line in any given column and pressing line feed. The cursor would then reappear at the top of the next column. There was no attempt to limit drawing within these borders, so it was up to the host software to ensure lines remained within the margins by inserting CR/LF characters at appropriate points. Lines writing to margin 0 would extend the full length of the screen if CR/LF was not sent to wrap before the 35th character, although any data in the margin 1 area on the same line, being written later, would be drawn on top.