Here is a list of some common merge fields inside of Actionstep.
The full list of available merge fields depends on how your system has been configured and can be found at Admin > Document Assembly > Merge Field List.
For quick reference here are some common merge fields (remember to enclose these in double square brackets or insert as MS Word merge fields).
system_date (default date format)
system_date|fm= %B_%d,_%Y (specific format: January 27, 2017)
Client Address Block
(For other participant types change "Client" to that participant type)
MailingAddressLineComma|pt=Client (address line 1 and address line 2 (if populated) separated by a comma)
MailingStateProvince|pt=Client MailingPostCode|pt=Client (state and zip)
MailingCountryIfForeign|pt=Client|ifnull=ignore (country - only show this if the country is foreign)
Your Name and Email Address
Useful for letter templates. It will insert the name of the person generating the document.
FullName|pt=Current__user (note the double-underscore in Current _ _ user)
CompanyName|pt=Div__action (Note the double underscore)
For multi-divisional systems this will output the name of the division the matter belongs to