Update README.md

Author: thiagodnf

README.md

@@ -4,7 +4,7 @@ A comprehensive collection of Gnuplot examples
 
 ## Usage
 
-## Types
+## Examples
 
 ### Line Charts
 
@@ -15,29 +15,52 @@ A comprehensive collection of Gnuplot examples
     <img src="https://user-images.githubusercontent.com/114015/102024554-bd7a5d80-3d60-11eb-8959-c6bff721ef47.png"/>
     </kbd>
 </div>
-    
 
 ### Column and Bar Charts
 
 #### Basic Bar
-![basic-bar](https://user-images.githubusercontent.com/114015/102024574-dc78ef80-3d60-11eb-96c7-d934d82595d2.png)
+<div >
+    <kbd>
+        <img src="https://user-images.githubusercontent.com/114015/102024574-dc78ef80-3d60-11eb-96c7-d934d82595d2.png"/>
+    </kbd>
+</div>
 
 #### Basic Column
-![basic-column](https://user-images.githubusercontent.com/114015/102024553-bce1c700-3d60-11eb-81a3-4edb9b00bdcd.png)
+<div >
+    <kbd>
+        <img src="https://user-images.githubusercontent.com/114015/102024553-bce1c700-3d60-11eb-81a3-4edb9b00bdcd.png"/>
+    </kbd>
+</div>
 
 #### Column with Negative Values
-![column-with-negative-values](https://user-images.githubusercontent.com/114015/102024556-bd7a5d80-3d60-11eb-9722-6ea7e9500009.png)
+<div >
+    <kbd>
+        <img src="https://user-images.githubusercontent.com/114015/102024556-bd7a5d80-3d60-11eb-9722-6ea7e9500009.png"/>
+    </kbd>
+</div>
 
 #### Stacked Column
-![stacked-column](https://user-images.githubusercontent.com/114015/102024562-c10de480-3d60-11eb-80af-a928a155a64b.png)
+<div >
+    <kbd>
+        <img src="https://user-images.githubusercontent.com/114015/102024562-c10de480-3d60-11eb-80af-a928a155a64b.png"/>
+    </kbd>
+</div>
 
 ### More Chart Types
 
 #### Spiderweb
-![spiderweb](https://user-images.githubusercontent.com/114015/102024561-c0754e00-3d60-11eb-9059-239e0086b942.png)
+<div >
+    <kbd>
+        <img src="https://user-images.githubusercontent.com/114015/102024561-c0754e00-3d60-11eb-9059-239e0086b942.png"/>
+    </kbd>
+</div>
 
 #### Box Plot
-![box-plot](https://user-images.githubusercontent.com/114015/102024555-bd7a5d80-3d60-11eb-8f59-22a579b6301b.png)
+<div >
+    <kbd>
+        <img src="https://user-images.githubusercontent.com/114015/102024555-bd7a5d80-3d60-11eb-8f59-22a579b6301b.png"/>
+    </kbd>
+</div>
 
 ## Questions or Suggestions