GUIDE.md in rspreadsheet-0.2.0 vs GUIDE.md in rspreadsheet-0.2.3

@@ -44,10 +44,10 @@
 
 book.save
 
 ```
 ## Conventions
-  * all coordinates and arrays are 1-based (spreadsheet world is 1-based, ruby is 0-based do I had to make a decision. I intend to make an global option for this, but in early stage I need to keep things simple. 
+  * **all indexes are 1-based**. This applies to rows, cells cordinates, and all array like structures like list od  worksheets etc. Spreadsheet world is 1-based, ruby is 0-based do I had to make a decision. I intend to make an global option for this, but in early stage I need to keep things simple. 
   * with numeric coordinates row always comes before col as in  (row,col)
   * with alphanumerical col always comes before row as in F12
-  * Shorter syntax worksheet[x,y] returns value, longer syntax worksheet.cells(x,y) return cell objects. This allows to work conviniently with values using short syntax and access the cell object if needed (for formatting for example).
+  * Shorter syntax worksheet[x,y] returns value, longer syntax worksheet.cells(x,y) return cell objects. This allows to work conviniently with values using short syntax and access the cell object if needed (to access formatting for example).