To Change the Page Setup of One or More Sheets in a Drawing Set for Publishing

Click Output tabPublish panelPublish. Find
In the Publish dialog box, ensure the sheets for which you want to change the page setups are listed.
Select one or more sheets in the list.
Right-click the selection. Click Change Page Setup.
In the Page Setup list, select a page setup to apply to the drawing sheets.
Note:
Change the page setup for each layout depending on your desired output. Model space page setups can only be applied to model space sheets; paper space page setups can only be applied to paper space sheets.