@kkappiah
Here is an example from the OpenEMR demo.
After login into the demo site, as an administrator, here:
Go to Administration → forms → layouts, and select the “Demographics layout” form:
You can see the question mark at the rightmost area of every field. Now green in the image above.
Clicking on it will show an options window as follows:
The rest should be self-explanatory. If it is not please let me know.