Why sticky notes disappear in fullscreen on a Mac

You write a note, take your document or timeline fullscreen, and the note is gone. Come back out of fullscreen and there it is, sitting on the desktop where you left it. This catches people out constantly, and it is not a bug in the note app. It is a direct consequence of how macOS decides where a window lives.

Fullscreen is a Space, not a bigger window

When you click the green button, macOS does not stretch the window to fill your display. It creates a brand new Space and moves that one app into it. Mission Control shows this clearly: your desktop is one Space, and every fullscreen app is its own separate Space sitting beside it.

Ordinary windows belong to exactly one Space. Your note was created on the desktop Space, so that is where it stays. Switching to a fullscreen app is closer to switching to a different virtual screen than it is to maximizing a window, and the note simply is not on that screen.

This is why Apple's own Stickies has never handled it. Stickies windows are regular app windows, so they follow the standard rule and stay behind on the desktop. The same applies to most third party note apps, widgets, and anything you have dragged into a corner and hoped would stay put.

The note did not close and it did not fail. You walked into a different room and left it behind.

The workarounds, and where each one breaks

There are several well travelled answers to this. All of them work in a narrow sense, and all of them cost something.

• Split View. Put your app on one side and the note app on the other. You keep the note, but you give up somewhere between a third and half of your screen permanently, which defeats most of the reason you went fullscreen.
• Assign to All Desktops. Right click an app in the Dock, choose Options, then All Desktops. This genuinely helps for moving between desktop Spaces. It does not put a window on top of another app's fullscreen Space, so it does not solve this particular problem.
• Screenshot the note. People do this more often than they admit. It survives anywhere because it is just an image, and that is also the problem: you cannot edit it, tick anything off, or search it later.
• A second display. The most effective option if you have one. Put the note on the other screen and go fullscreen on the main one. It works, but it is not much use on a laptop on a train, and it means the note is out of your sightline rather than next to the work.
• Leave fullscreen behind entirely. Run everything in ordinary windows and accept the menu bar and the clutter. Plenty of people land here, having decided fullscreen is not worth the trouble.

What none of these do is the obvious thing, which is to let a small note float over a fullscreen app the way the volume overlay or a notification does.

Why some windows can float over fullscreen

macOS does allow it, but the app has to ask for it. A window can be marked as an auxiliary panel, which tells the system it is allowed to appear over the active fullscreen Space instead of being pinned to the Space it was born on. Notifications use this. So do the small floating controls in some video and audio apps.

The important part for anyone hunting through System Settings: this is a property of the app, not a setting you can switch on yourself. If a note app was not built to float over fullscreen, no amount of Mission Control configuration will make it. That is the whole reason the workarounds above exist.

How TackNote handles it

TackNote notes are built as floating panels, so they ride along into fullscreen. Take a document, a browser, or an edit timeline fullscreen and the note stays on top of it, still editable, exactly where you left it. No Split View, no second monitor, no screenshot.

The part that matters more is what happens next. Because TackNote notes are tacked to a specific window, tab, document, or project rather than floating over everything indiscriminately, going fullscreen does not drag your whole notes collection with you. You see the note that belongs to the thing you are looking at, and nothing else. Switch to a different fullscreen app and that note steps aside for the one that belongs there.

Capture works the same way. Press ⌘⌥⌃N without leaving fullscreen and a new note appears already tacked to the window in front of you, so you never have to drop out of fullscreen just to write something down. Every shortcut can be remapped, including to a mouse button.

Where this tends to matter most

• Video and audio work, where the timeline is almost always fullscreen and the note is a shot list or a client change request.
• Writing, where the whole point of fullscreen is removing distractions but you still need the brief in view.
• Research across browser tabs, where each tab has its own note and every one of them survives going fullscreen.
• Any laptop without a second display, which is where the usual workarounds hurt the most.

The short version

Your notes are not vanishing. A fullscreen app gets its own Space, ordinary windows stay on the Space they were created in, and Apple's Stickies plus most note apps use ordinary windows. The only real fix is a note that was built to float over fullscreen in the first place, which is a decision made in the app rather than in your settings.

If you are choosing between apps, our best sticky notes app for Mac comparison puts Apple Stickies, Apple Notes and TackNote side by side, including the row where ours loses.