how to remove objects from panel

How to remove some objects from panel.
In Gnome panel, i could only able to add things to panel. and i could able to remove only those thins from the panel.
But i could not able to remove the default things that came up while installing. Example. workspace, monitor settings.

You could remove workspace, just right click on the side of it, not on an actual “window”… The monitor settings are a part of your notification area, they cannot be removed unless you remove the whole notification arena, which is not recommended, or another way is to just … configure your displays ;D

Good luck.