Ob29 step i170 in the change view fiscal year

What is the Transaction code to Maintain the Fiscal Year Variant?
OB29 
Step: I.1.70: In the “Change View “Fiscal year variants”: Overview” screen ” , Click
Change -> Display .
42: What happened after you hit the display/change button?
All of the positive and non positive dates and values on the calender filled out 
43: Why is it important to use this button?
To see all of the settings 
There are three types of messages you will receive when completing your assignments
➨ If you double-click on the message it will give you detailed information about the
message.
1. (Red) Error Messages: Red Error Messages are to indicate to you that something is
stopping the transaction from being completed. These messages need to be corrected to
proceed through the exercises.
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Section I.12: Display/Change
Section I.13: System Message Types

2. (Yellow) Warning Messages: Yellow Warning Messages contain warnings and are there
to tell you about some sort of information that may be helpful later, or warn you about
the possible effects of what you are about to do. At times, these must be fixed to move
on. However, most of the time, they do not need to be fixed and you can simply press
enter to cancel them and go through them. Use your best judgement to determine what
needs to be done.
3. (Green) Confirmation Messages: Green messages are obviously showing that nothing
went wrong with the transaction and that you may proceed to the next task. These
messages will contain information you will want to write down and take note of.
This step will help to familiarize you further with the different system messages by having you
produce each type and figure out how to get past it.
Navigation
SAP Menu  Logistics  Materials Management  Purchasing  Purchase Order  Create 
Vendor/Supplying Plant Known
44: What is the transaction to Create a Purchase Order?
ME21N 
Step: I.1.71: In the “Create Purchase Order” screen, enter the following
information:
➨ Go ahead and close the user interface pane in the left side of the screen if it opens.
➨ Remember what was said in a previous step about the different sections of the screen.
You may have to open additional sections and explore the tabs to find this field.
Attribute Description Data Value
Purch. Org An organizational unit in Logistics, subdividing an enterprise
per the requirements of Purchasing
US00
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Step: I.1.72: Click Enter .
IMPORTANT NOTE: USING ENTER
Once you click the enter button or press “enter” on your keyboard, the system checks to ensure
that you have entered all the data that is required in the document.
If you have not, it will ask you to enter valid data into each field, ONE BY ONE, through
messages. After entering data into the designated field, you must PRESS ENTER AGAIN to
move on to check the system for more messages.