The func_text entity type is an easy label that can display text in a map with little effort.
An example of func_text is the Quake3_Quake1 demo map "The Hotel" which has many rooms, their room numbers displayed.
Inside the map editor, it appears as follows:
Colormod - Alter the color
Multiline Text With Newline is [p]
Result
Clocks
Notes:
- Digital font setting "text_isdigital" "1". This font is digits only and does not have letters.
- Angles .. 0 is text on the east side, 90 is text on the north side, 180 is text on the west side and 270 is text on the south side and 33.3 would be northeast favoring east. Any combination of angles in all 3 axis will work.