You can create an HTML-based email template for the Activity Entry Email that participants will use to approve a request.
To create an HTML-based email templates for approval:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD><TITLE></TITLE> <META http-equiv=Content-Type content="text/html; charset=utf-8"> <META content="MSHTML 6.00.6001.18319" name=GENERATOR> </META></HEAD> <BODY bgColor=#ffffff> <STYLE type=text/css> <!-- p.one {border-left-color:#397dd0; border-bottom-color:#397dd0; margin-left:50px; width:500px; border-top-style:solid; border-top-color:#397dd0; border-right-style:solid; border-left-style:solid; height:225px; border-right-color:#397dd0; border-bottom-style:solid} --> </STYLE> <P class=one style="WIDTH: 444px; HEIGHT: 257px"><BR> <TABLE name="ApprovalInfo"> <COLGROUP width=25></COLGROUP> <TBODY> <TR> <TD></TD> <TH><SPAN style="FONT-FAMILY: Arial Narrow"> Approval Information:</SPAN></TH></TR> <TR> <TD></TD> <TD><SPAN style="FONT-FAMILY: Arial Narrow"> <INPUT type=radio CHECKED name={/pd:myFields/pd:Approved}> Approved</INPUT> </SPAN></TD></TR> <TR> <TD></TD> <TD><SPAN style="FONT-FAMILY: Arial Narrow"> <INPUT type=radio name={/pd:myFields/pd:Approved}> Rejected</SPAN></TD></TR> <TR> <TD></TD> <TD><SPAN style="FONT-FAMILY: Arial Narrow">Remarks: </SPAN><INPUT style="WIDTH: 250px" size=25 value="Test Remark" name={/pd:myFields/pd:Remarks}></TD></TR> <TR> <TD></TD> <TD><SPAN style="FONT-FAMILY: Arial Narrow">Please don't remove or edit the information below this line. </SPAN></TD></TR> <TR> <TD></TD> <TD><SPAN style="FONT-FAMILY: Arial Narrow"> <HR> </SPAN></TD></TR> <TR> <TD></TD> <TD><SPAN style="FONT-FAMILY: Arial Narrow"> TaskId: ${TaskID}</SPAN></TD> </TR> <TR></TR> <TR></TR> </TBODY> </TABLE></P></BODY></HTML>