The Set living" command lets you set (or clear) the "Living" flag for a group of people at once.

 

To access Set Living, select the People page, then select Tools > Set Living from the menu.

 

 

Simply choose whether to set the "Living" flag to true or false then click the "OK" button. RootsMagic will bring up the select people dialog for you to choose which people to set the living flag for.