It is wrong to try to find data using F1 on the screen followed by F9. Sometimes it might work but please don't
get used to it. Following URL discusses regarding how to find data with an example:

Concepts:
On-line  processes  which acts as an interface  between  the
user  and   the   database   presents only User   data-iems.
Identification of tables and field name simply from the user
interface   screen   fields   means   expecting   one-to-one
relationship between User data-item and System data-item(Table
and field). It will not be the case always.
The  difference between data-items users interact  with  and
fields    of    the   table   is   due   to   Normalization,
Parameterization and other reasons[Ref. 1.2].

This   mismatch  between  UDI  and  table-field  makes   the
production of  organizational documents, reports  and  forms
more  involved. The complexity of report is due to the  lack
of  one-to-one  correspondence between the  user  data-items
and  system  data-items.
 
 

Ref. 1.2
-----------------------
Reasons  for  the  lack  of  one-to-one relationship between
Organizational User data-items and Physical database are :

1.  Implementation of RDBMS requires Normalization of  data-
items.  Normalization breaks the user data-items into atomic
data-items,  establishes  the  one-to-one  relationship  and
removes transitive relationship among these data-items.
Result  of all this is that the database of the Organization
is  much  different  from  the user  data-item  set  of  the
Organization.
2.  This difference between the database and the user  data-
item  list increases further due to Parametrization  of  the
Information   Management   System.   Parameters    introduce
flexibility in the system making it easier to infuse the on-
going  changes  of the Enterprise decision system  into  the
Information system. Parameters increase the distance between
the  entity-user data-item relationship of the  organization
and relationship among tables in the database.
3. Sometimes an organization is so big that it has different
types of information which are similar in structure and  may
be  kept  in  the  same  table.  These  different  types  of
Information is qualified so that it is possible to point  to
one  kind  of  Information  Use of  this  type  of  database
increases the difference between the database and the Entity-
User data-item list even further.
4.  There are many more decisions that are taken during  the
database design. All these increases the difference  between
Data-items    kept   in   the   database   and    Data-items
required(used) by the Organization.