Update README.md

README.md

@@ -2,9 +2,16 @@
 This is a program to compress and decompress files using Z-Library.
 
 ## How to use
+### 1-file (de-)compression
+1. (optional) Write a compression level in textbox. (only when compressing)
+2. Press the button "Compress" or "Decompress" and choose the file.
+3. Choose the destination file.
+4. Profit!
+### Multiple files (de-)compression
 1. (optional) Write a compression level in textbox (only when compressing)
-2. Press the button "Compress" or "Decompress" and choose a file.
-3. Profit!
+2. Write destination files' extension in textbox.
+3. Press the button "Mass compress" or "Mass decompress" and choose the files.
+4. Profit!
 
 ## Developers
 Program written using Python by dzhemvrot (me) and osaten.