LayoutIDs
Purpose 
Returns a list of all layout IDs in fileName, separated by carriage returns.
Format 
LayoutIDs(fileName)
Parameters 
fileName - the name of an open database file (local or remote).
Important  See Design functions for information about literal text parameters.
Data type returned 
text
Originated in 
FileMaker Pro 6.0 or earlier
Description 
If no parameter is specified for fileName, FileMaker returns results for the current file.
Examples 
LayoutIDs(“Customers”) returns a list of all the layout IDs in the Customers database file.
Related topics 
Functions reference (category list)
Functions reference (alphabetical list)
About formulas
About functions
Defining calculation fields
Using operators in formulas