Logarithm of base 2 in Mathcad

Some people are confused when in Mathcad (e.g. version 15) they see only two logarithms in the list of operators: natural and decimal.

The operators panel in the Mathcad 15:

Figure 1: Operator panel

Figure 2: Calculate the logarithm log(8)=0.903

How to calculate logarithm, e.g., base 2: log_2 8?

It's simple. When you write a decimal logarithm, then enter the base you need, separated by a comma. A base 10 is just the default:

Figure 3: Calculate the logarithm log(8.2)=3