How to get ride of the top icons?

I’m using the GanttProjet 3.0.3.
Is there a way to get the icons of the top bar (open, save,…) smaller ? Or better, simply get ride of it.
They are taking a lot of space and there are no really useful.

It is not possible, sorry.

Thanks for the response and this nice job anyway.
Let’s say it would be a wish for me.