Update README.md

README.md

@@ -14,8 +14,11 @@ Trans-PCO allows the use of many types of gene groups or sets. For example, gene
 
 
 
-![](docs/pipeline.png){width=60%}
+<p align="center">
+  <img src="docs/pipeline.png" width="800" />
+</p>
 
 Figure: Three main steps in trans-PCO pipeline. The first step of trans-PCO pre-processes RNA-seq data to reduce false positive trans-eQTL associations due to read alignment errors. The second step involves grouping genes into gene sets, such as co-expression modules or biological pathways. The last step tests for trans-eQTLs of each gene set by a PC-based multivariate association test.
 
-<img src="docs/pipeline.png" width="800">
+
+