iac iview settings

Dear experts,

i m created sap iac iview and in application parameter i give ~transaction=su01 & ~WEBGUI_SIMPLE_TOOLBAR=160 and hide back and exit button from the transaction but when i again press the enter it again shows the exit and back option

and my second problem is that what value we pass to ~WEBGUI_SIMPLE_TOOLBAR so that save button comes in the su01

transaction

please help...............