GTK+ Forums

When i add in a vertical box a menubar,toolbar,notebook and statusbar there are rounded corners between :
toolbar and notebook
notebook and statusbar

how can i remove them?

Maybe the tab curvature property?

GTK by and large doesn't control the way the widgets are rendered on the screen so much as leaving that up to the host Operating System to define the style in .css templates. You may be able to hardwire one, though it's best not to. It is set up this way for a reason. It is done so that users can customise their system to have a certain style that is consistent across all their applications. If you try to force a certain style it will break this consistency.