## set clab

`set clab option`

Controls contour labeling. The `option` argument may be one of the following:

`on` 'fast' contour labels are plotted where the contour lines are horizontal
`off` no contour labels
`forced` an attempt is made to label all contour lines
`format` gives a C-language template for conversion of the contour value to a string

### Usage Notes

1. Changes to the contour labels are reset by clear, but not display.

### Examples

1. This command would cause all contour labels to have 2 digits after the decimal point:
   `set clab %.2f`

2. For contouring temperatures, this command would add a degree symbol and the letter "C":
   `set clab %.0f`3.`1C`