I have come across an unusual problem in Blender. All of the buttons down the left in the properties panel have disappeared when in the Layout tab. They appear again in all the other tabs though. If I load a new Blender file everything is back to normal and the buttons are back so I am wondering if I inadvertently toggled a setting in that particular Blender file that hides the bar in the properties panel. I cannot work out how to get it back.
I have checked the forum for answers in older threads but the only one found suggests that I make sure something is selected which I have with no luck.
Any help would be appreciated.