Shortcuts working in Rhino instead of Grasshopper

Hi there,

i know that there has been a thread about this, but i just can´t find it. I have got the problem that my buttons, for example "Delete" do not work in Grasshopper anymore.

Everything i type goes directly to the Rhino Commanline.

I knew how to fix this, but i forgot about it and right now i have to restart rhino again and again ;(

Thx for your help :)