diff --git a/Region-Pager-Base.md b/Region-Pager-Base.md
index 7085045..5ed6bd2 100644
--- a/Region-Pager-Base.md
+++ b/Region-Pager-Base.md
@@ -4,13 +4,13 @@
 Region::type_t SetTile(int x, int y, int z, Region::type_t v);
 ```
 
-This takes an `x`, `y`, and `z` zero indexed parameter, indicating a tile in the map, and a layer. `v` is the new value for that tile. This function retreives a region with `GetRegion`, then it calls that region's `SetTile`.
+This takes an `x`, `y`, and `z` parameter (`z` is zero indexed), indicating a tile in the map, and a layer. `v` is the new value for that tile. This function retreives a region with `GetRegion`, then it calls that region's `SetTile`.
 
 ```C++
 Region::type_t GetTile(int x, int y, int z);
 ```
 
-This takes an `x`, `y`, and `z` zero indexed parameter, indicating a tile in the map, and a layer. It will return that Region::tile_t. This function retreives a region with `GetRegion`, then it calls that region's `GetTile`.
+This takes an `x`, `y`, and `z` parameter (`z` is zero indexed), indicating a tile in the map, and a layer. It will return that `Region::tile_t`. This function retreives a region with `GetRegion`, then it calls that region's `GetTile`.
 
 ```C++
 bool SetSolid(int x, int y, int b);