On this page: formulas in fields - formulas in the "visible" property
You can write formulas in the content of the field. This formula must
start with =. You can use complex mathematic formulas.
Example:
=[Details].[unitprice]*[Details].[quantity]*(1-[Details].[discount])
The structure to get the content of the result of a field is:
[section name].[field name (result of the query)]
If the part "name of the section" is omitted then the field will be searched in the current section, in this case you can write:
[field name (result of the query)]
The visible property can accept formula. In this case you don't need to start
the formula with =. The formula must produce a Boolean (true or false) result.
In the field property you can also use the keyword "[me]" to use the value of
the field itself in the formula.
For example:
[me]<>0
The field will be shown only if its value is different than zero.