If you can fold a section of code, a
symbol (minus sign
in a blue circle) appears in the Marker Bar beside the first
line of the section. Click this symbol to collapse the display of the section. When
collapsed, you can display the hidden code by hovering the cursor over the icon:
After you fold the code, the first line of the section remains and the symbol changes
to (plus sign in a
blue circle). Click the symbol to expand the section. See Formatting and display
features for more details.