The Customize dialog adds and removes panes and toolbars from the main Manifold display. Check the box to show the associated pane or toolbar.
Toolbars will automatically become enabled or disabled for usage as different windows become active. For example, the Format toolbar will be active when we click into a drawing window or into a map window for a map that includes drawings, but it will be inactive when we click into an image window [formatting applies only to drawings].
Therefore, to list a toolbar in the Customize dialog so that it may be checked on or off, first open a window that would normally use that toolbar. It will then be listed in the Customize dialog.