Sometime you can't understand why user want specific things which really does not have good cause. The one such case is turning off Horizontal menu in one of the Oracle EBS forms.
If this is the case, there is no shortcut or profile option, rather you need to take technical help some who can open the form in Builder.
If you required to eliminate the forms default menu?
Here to go:
In the Form Builder, open the property palette for the Form. Highlight the form name. Right mouse click to open the property palette. There should be listed a menu - the default menu is default & smartbar. Just Delete this.compile and restore within the application top of form sub folder.
Anyone have better idea , to turn off horizontal menu ???