Column Input Greyed out in MySQL Workbench

I have had the same prb in MySQL Worbench 6.3.6. Here is the link to the solution. Or just drag down your Output Panel in short !

http://bugs.mysql.com/bug.php?id=79281

When you started creating a new table you can simply add columns by double clicking the empty placeholder row:

Click on the encircled double arrow

You will now be able to edit columns. Click on any column name, grey area will become editable now.