Command bars disappeared, help please

For some reason some command bars have disappeared and I can't figure how to put them back.

I use to have up the top the undo arrow, if I go to command bars in Options if I choose standard the undo arrows come back but I then loose the colour eyedropper tool in my tool bars down the left.

I'm just use to these all being visible, I know we all work differently and I have know idea why this all changed.

Cheers

Tony