allow optional viewing of full time series

packages/openneuro-app/src/scripts/dataset/files/viewers/file-viewer-nifti.tsx

@@ -14,14 +14,23 @@
         url: imageUrl,
         colorMap: "gray",
         opacity: 1,
-        visible: true,
         limitFrames4D: 5,
       },
     ]
     const nv = new Niivue({ dragAndDropEnabled: false })
     ;(window as any).niivue = nv
     nv.attachToCanvas(canvas.current)
-    nv.loadVolumes(volumeList) // press the "v" key to cycle through volumes
+    nv.loadVolumes(volumeList) // press the "v" key to cycle through views (axial, coronal, sagittal, 3D, etc.)
+    nv.graph.autoSizeMultiplanar = true // use autosizing
+    nv.opts.multiplanarForceRender = true // ensure that we draw the time series graph in the tile usually reserved for the 3D render
+    nv.graph.normalizeValues = false // use raw data values on y-axis
+    nv.graph.opacity = 1.0 // show the graph
+    // Notes: 
+    // 1.   If an image only has one volume, the timeseries graph will not be visible.
+    //      The 3D render will be placed in the graph tile instead. 
+    // 2.   Users can navigate volumes forward and backward in the series using the left and right arrow keys on desktop devices
+    // 3.   On touch screens, users can tap on the timeseries graph to jump to a volume index
+    // 4.   Users can load all volumes by clicking on the "..." displayed on the timeseries graph
   }, [imageUrl])
 
   return <canvas ref={canvas} height={800} />