How to Customize the Share Menu on macOS

Click the Apple menu. It’s the apple-shaped symbol at the top-left corner of the screen.

Click System Preferences.

Double-click Extensions. It’s in the third group of settings and has a puzzle piece icon.

Click Share Menu. It’s in the left panel.

Select apps to add or remove. If you see a check mark next to an app name, the app currently appears in the Share Menu. To remove an app, remove its corresponding check mark. To add an app, find it in the list, then click its corresponding box to add a check mark.