Comment 21 for bug 186448

How to select/access invisible parts in Thunderbird (Firefox) when window is cut off!

If this issue is still relevant to anybody...while I haven`t found a bug fix, the easiest way to access non visible parts in Thunderbird Account Settings etc. is using your PC`s TAB key...click on the uppermost visible part in the settings window, then start pressing the TAB key and it will either highlight or dotframe selected settings in succession...if the next visible part is not highlighted or dotframed, then you know you have hit an invisible setting, press Enter...and there you go.