When subject has CRF or Visit need to be signed, system displays 
iocn in Action column at Subject Matrix screen
Sign for a CRF
...
User click on "" → system goes to "Enter data" screen which displays all CRFs need to be signed
Go inside desired CRF and click "Sign" button
After signing successfully,
- CRF has "Signed" status
Sign for a Visit
...
Instead of clicking on as above described, user also can sign for a visit as below way
At subject matrix screen, User click on "Completed" or "Skipped" Visit which is not signed
User click on "Sign" button at "VIST INFOR" section
