Synopsis:

enable num [num ...]

Enables breakpoints, watch expressions or actions given as a space separated list of numbers which may be prefaces with an 'a', 'b', or 'w'. The prefaces are interpreted as follows:

a — action number
b — breakpoint number
w — expression number

If num is starts with a digit, num is taken to be a breakpoint number.

Examples:

enable 1 2    # Enable breakpoint 1 and 2
enable b1 b2  # Same as above
enable a4     # Enable action 4
enable w1 2   # Enable watch expression 1 and breakpoint 2

See also:

info break to get a list of breakpoints, and disable to disable breakpoints.