Result

Windows

Mac OS

Apply master to selected page

Alt-click master

Option-click master

Base another master page on selected master

Alt-click the master you want to base the selected master on

Option-click the master you want to base the selected master on

Create master page

Ctrl-click Create New Page button

Command-click Create New Page button

Display Insert Pages dialog box

Alt-click New Page button

Option-click New Page button

Add new page after last page

Shift+Ctrl+P

Shift+Command+P