You can select Worksheet Options from the
Tools menu, and change its value at the start of the worksheet from the
Built-in Variables tab.
– or –
You can change its value in the body of the worksheet
using the Seed function.
Seed(x) Resets the value of Seed to x,
and returns the previous value.
Arguments:
In each case, unless noted,
x is a dimensionless integer between 1 and 2147483647.
Each seed value selects a unique sequence of uniformly distributed quasi-random
numbers.
Note:
If Seed is called before any random number generator functions, its return
value is the same as that set in Worksheet options. If Seed is called
after a random number generator function, its return value is the subsequent
value of the seed used to calculate the next number in the sequence.