How can I get multi functionality of two buttons in single button using controller extensions?

Hi Pranav,

You can use 'action' and 'onclick' respectively on a single button click.
For eg.
<apex:commandButton action="{!savePDF}" onclick="CaptureSignature();" value="Save" id="theButton" />
This command button doing two different functionality on a single click ie. saving pdf as well as capturing signature.

Thankyou