Safari has some menu items that are dimmed and won't work. Is there a way to make them active? I'm running High Sierra on my older iMac. I use Safari as my browser. Under several of the Safari, menu items are certain options that are dimmed out and can't be run. Specifically, under the History menu is an option to open all windows from the last session. This could come in handy but that menu item appears to not be active and clicking on it has no effect. Is there any way to use these menu items?
Safari has some menu items that are dimmed and won't work. Is there a
  way to make them active?


Two possibilities that I can think of.

1- If you clear the history before quitting Safari, it wont be there when you restart.



2- If you have a setting in Safari to clear the history after set time.