When a Custom Button is deleted, it is removed from all Page Layouts. It will not appear in the Recycling Bin and cannot be recovered once it has been deleted.
To delete a Custom Button:
- Go to System Settings > Objects and Fields.
- Select an object and click Custom Buttons.
- Find the button you want to delete. Click the three-dot menu.
- Click Delete This Custom Button.
- A warning will appear. Click OK.
Removing a Custom Button from a layout
If you still plan to use the button on other layouts, you can just remove the button from a single layout.
- Go to System Settings > Objects and Fields. Select an object.
- Go to Page Layouts and select a layout.
- Click the Custom Button to remove it.
- A warning will appear. Click OK.