You can add a new country or edit any existing country by following these easy steps:
Step 1: Select 'All Countries'

On ribbon, click the "Admin" tab.
Under Dictionaries group, select "All Countries".
Step 2: Select 'New'

Right click anywhere inside this window and from drop down menu, select "New"
Note:
You can also create a new country either by right-clicking on the country's grid and choosing "New" or by double clicking anywhere on blank area. You can also choose "New" command on quick-access toolbar.
Step 3: Fill the Form

Here you can enter name, code etc. for this country.
Note:
The fields marked with red star (*) at right end, indicate that these are required-fields while any other field can be left blank.
Step 4: Click 'Save & Close'
When you have finished to enter all the desired info, to save this data, choose any one option on ribbon:
Save and Close: saves everything you have entered so far and closes the form
Save and New: saves everything you have entered so far and reopens a blank form for another entry.