Update SelectBigROI.md

mpourmpoulis · mpourmpoulis · commit 4b1ffc40d5e2 · 2019-11-14T23:45:12.000+02:00
diff --git a/doc/SelectBigROI.md b/doc/SelectBigROI.md
@@ -176,6 +176,6 @@ Finally, we clarify one more thing! What about relative vertical offsets when us
 ![](./gif/big9.gif)  
 
 
-please note however that there are limitations  and sub indexes are more for solution to make the simplest case faster
+please note however that there are limitations  and sub indexes are more of a solution to make the simplest case faster
 rather than a systematic way of handling complex code!
 
