Graph instructions

Author: lee-naish

src/algorithms/instructions/index.js

@@ -79,7 +79,8 @@ on the arrow in its middle, the right and bottom panels can be enlarged or shrun
 by dragging the "..." up temporarily`,
     `Under the ${KEY_PLAY} button, toggle between sample graphs (eg Graph 1) and random graphs, or`,
     'edit text for X-Y node coordinates (this can change the graph size) and edges/weights (weights are ignored for unweighted graph algorithms), or',
-    'enter X-Y node coordinates and edges/weights in tables.',
+    'enter X-Y node coordinates and edges/weights in tables below, or',
+    'change X-Y node coordinates by selecting a node with the mouse and dragging it.',
     `The graph size can also be explicitly increased/decreased - this generates a new random graph.`,
     `Edge weights (for weighted graph algorithms) can be toggled between Euclidean, Manhattan and as defined explicitly in the input.`,
   ]},