How to assign multi-line values

Multi-line values can be assigned using round brackets like this:

page.10.value (
First line
Second line
)

Please beware of the following rules when using multi-line values and round brackets:

multi-line instructions always begin with an opening round bracket
the assign operator (=) must be skipped
characters behind the opening bracket are ignored, so make sure you enter contents in the next line
closing brackets must be the first characters in the next line in order to close the multi-line instruction