In the PMF setting, there is default dimension level, but we don’t know how this is used in PMM
....
When we bring up lets say “Current vs Previous”, we want the user to come into a default dimension (e.g. location) at certain default level (e.g. level_2)
....
This is not a security issue for us, so don’t ant to limit this user to see other dimensions/levels, just want to have a default starting point.
...
thank you,
...
Endre
...

This option works the same in both PMF and PMM. It sets a default "pre-drill" level for reports. It does not limit the user to only seeing that level - in short it is not designed to replace PMF access security.

Note that it is pre-configured to control only one report in the system - the Scorecard Dimensional Breakout report (scrd_layout_dim01.fex). It can be added easily to any other report in the system; there is a utility FOCEXEC (a_dims_default.fex) to make this easier to do by simply doing a -INCLUDE in WebFOCUS language. Adding that -INCLUDE

here is code taken from scrd_layout_dim01.fex showing how it is used:

  
-******************************************************************************************************************************
   Validate input parms
-:S01
-******************************************************************************************************************************
-INCLUDE A_DIMS_DEFAULT
-IF (&&ERR_MSG = ' ') THEN GOTO :S02 ;

-SET &&ERR_MSG = 'Error S01_A in scrd_layout_dim01: ' | &&ERR_MSG ;
-GOTO :ERROR_XT

-******************************************************************************************************************************
   &DIM_NAME, DIM_LEVEL, and &DIM_VALUE are <= 12 character names for !IBI.AMP vars used in HTMLFORM SCRD_LAYOUT_DIM01
-:S02
-******************************************************************************************************************************


-SET &DIM_NAME     = &DIMENSION_NAME ;
-SET &DIM_LEVEL    = &DIMENSION_LEVEL ;

-SET &DEFAULT_STATEMENT = '-DEFAULTH &' | &DIMENSION_NAME | ' = '' ''' ;
&DEFAULT_STATEMENT.EVAL

-SET &DIM_NAME_AMP = '&' | &DIMENSION_NAME ;
-SET &DIM_VALUE    = &DIM_NAME_AMP.EVAL ;

Note 1: If the View in PMF/PMM doesn't include a filter on Dimension, then you would not be able to apply the filter. For example, Project measure data is not dimensional, so you can't apply a default dimension to it.

Note 2: This option sets the default DIMENSION and LEVEL NAME. It does not filter on a particular value within that dimension level. That means you will be pre-drilled to the level, but you'd see all values at that level. It was primarily designed to pre-drill for users who were already filtered on that dimension (using an owner access role to set up what they were allowed to SEE), so they didn't have to click from the top level downward to see the level of detail they wanted.

Perfect. That is what we were looking for...
We tried it and looks good, Thank you!
Endre