Silva Elm's Sense
supports both Folding Text and "Big Picture" document editing as an integral feature of its outlining capability.
Full "Big Picture" document content is shown within its right hand (Edit Workspace) pane irrespective of the left hand pane (tree view) collapse state when Conventional ViewMode editing.
When working in Explorer ViewMode, Section and multi-level list content may be revealed and hidden according to the outline collapse state.
Explorer ViewMode expand / collapse icons are also shown in the right hand pane left margin in support of single pane working.