Seeing All Icons on the Menu Bar I currently have the following icons on the status bar. However, I have other applications running, specifically OneDrive, which I believe it is supposed to show an icon. 

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 

Does the status bar show all icons (of the apps running that would choose to have one) by default? If not, is there any way to either force it to show all icons or choose which ones to show?

I have tried re-running OneDrive and I confident it used to have one. I can see it running on my activity monitor, but I don't see the icon anymore (even after restarting the computer)
Finder has a relatively short app menu, so activating Finder is a quick way to see more menu bar icons.  (And the built-in Maps app has an even shorter app menu.)
Bartender collapses the menu bar items into a submenu, which will let you see more of them (without being hidden by app menus).