Update README.md

README.md

 # Omics Data Analyser
 
-This is an R program to visualize, normalize, and analyse omics data such as those from metabolomics, proteomics, and next-generation sequencing experiments. Data are supplied in a list or table along with parameter settings, all in an Excel file.
+This is an R program to visualize, normalize, and analyze -omics data such as those from metabolomics and proteomics experiments. Data are supplied in a list or table along with parameter settings, all in an Excel file.
 
 ## Current version: 1.7.1. Tested R version: 3.5.1
 
@@ -14,7 +14,7 @@ This is an R program to visualize, normalize, and analyse omics data such as tho
 
 **Step 4:** Fill out the Parameters, Comparisons, Features, and Samples sheets as necessary.
 
-**Step 5:** Run the program with your data and save results in an Excel file. If visualization is enabled, a Figures folder will be created to save the plot files in the postscript format (.ps). See below for ways of running the program.
+**Step 5:** Run the program with your data and save results in an Excel file. If visualization is enabled, a Figures folder will be created to save the plot files as postscript (.ps) and image (.png) files. See below for ways of running the program.
 
 1.  Running on the BioHPC @ UTSW. Log on the BioHPC ***Portal***, launch a ***Web Visualization*** node, open a terminal from there, and run the following: