RealFlow's viewport provides functions for zooming, panning, and rotating:
Important Viewport Commands
Aside from mouse-based actions there are also commands for zooming, and resetting the viewport in the “View” menu:
Restores RealFlow's default point of view.
Display all scene nodes (except Hybrido particles) as bounding boxes when zooming, panning, or rotating the viewport.
Fits all scene elements into the viewport.
Fits the currently selected node(s) into the viewport.
Centres the selected node(s) in the viewport.
Keeps the currently selected node in the viewport's centre.