viewing Original Object under synonyms
In the tree view on the left-hand-side, expand the tree for your database connection. Expand  "Other Users", then "XYZ", then "Views". Double-click on the view name "ABC_CHAR" - this will open the column list. Click "SQL" above the column list to see the query that created the view.

The other way to achieve this is to use SQL:

select text 
from all_views
where owner='XYZ' 
and view_name = 'ABC_CHAR';


This all assumes you have the correct grants to see the view text.