File->Open ...

File->Save

Reload current file from disk.

Redo last undone operation on the current tree.

Undo last operation on the current tree. (See also MaxUndo configuration option.)

Node->Find Previous

File->Previous File

File->Print ...

Node->Find ...

Node->Find Next

File->Next File

View->Previous Tree

View->Next Tree

View->Customize Tree...

View->List of sentences...

View->Split view horizontally

View->Split view vertically

View->Close current view

This button has two states. If pressed, all displayed views are tied together, so that pressing or buttons as well as invoking View->Previous tree or View->Next tree applies to all displayed views.