When I opened thunderbird it displayed all three of my email accounts in the left hand column and their associated folders: inbox etc. The contents of the selected folder, such as the inbox of one of the three accounts would be displayed in the right hand pane (left and right relative to the viewer). So I could switch between say the inbox of account 1 and the inbox of account two by selecting the appropriate folder. I did something, however. and now all the folders have disappeared from the left hand side and I am forced to use >GO >FOLDERS to select the folder I want to see the contents of. This is enormously frustrating as the process of managing the three accounts used to be effortless. I have pressed every combination but cannot restore my original view. I would like to be able to see all of my accounts simultaneously again. Does anyone know what to do, please? Thanks Frank