Labor has given The Greens the number two spot on its hand-out, but its number three goes to the SFF.

The SFF's how to-to-vote card advises voters to give their first vote to Seb McDonagh, with Labor's Dan Hayes at number two and the current MP, independent Joe McGirr, at number three. There are no suggestions for the remaining four candidates.

Labor's how-to-vote urges voters to fill in all seven boxes.

After Mr Hayes at number one, The Greens' Ray Goodlass second and Mr McDonagh at number three, Labor suggests Mr McGirr at four, independent Matt Quade at number five, Colin Taggart of the Australian Conservatives in at sixth and The Nationals' Mackenna Powell last.

Mr McDonagh said there had been no "deal" with Labor over preferences.

He said the decision to put Labor in the number two position had been prompted by similarities in the two parties' preferences on nurse-to-patient rations and registered nurses in aged care facilities.

Mr Hayes said the big focus for him with the how-to-vote cards was "putting The Nats last".

"The most important thing is that people fill in every box," he said.

"This very similar to what we did in the byelection.

"At the end of the day, it's only a how-to-vote card. People can make up their own minds on how to vote."

At the Wagga byelection in September, Labor and the SFF put each other in the number three spot.

University of Sydney politics lecturer Stewart Jackson said the decisions by the SFF and Labor could "make life difficult for The Nationals".

"Clearly, the SFF is making a push to distinguish themselves from the Conservative parties," Professor Jackson said.

As NSW has optional preferential voting, people can number just one box or as many as they like.

The how-to-vote cards of Dr McGirr, Mr Taggart and Ms Powell all advise voters to number only the first box.

Mr Quade said he would be advising voters to number just the first box, but if they did want to fill in all boxes, "to put the major parties at six and seven".

After Mr Goodlass at number one, The Greens are directing their preferences to Mr Hayes at number two, followed by Dr McGirr, Mr Quade, Mr McDonagh, Mr Taggart and Ms Powell.

Last week, NSW Premier Gladys Berejiklian ruled out doing a deal with the SFF if the Coalition needed minor party support to form government.

She called on Labor leader Michael Daley to do the same. However, Mr Daley has previously said preferences would be determined on a "seat-by-seat" basis.

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