Update README.md

README.md

@@ -9,6 +9,40 @@
 
 > `YYYYMMDDHHmmss` is retrieved from the datetime metadata of the file.
 
+**rename-arw** can also rename your jpg files assuming same name convention adopted for ARW files, the renamed files will have a sequential number in place of the original filename (EX. _DSC0270.ARW).
+
+So assuming we have the file `_DSC0270.ARW` within the `DCIM` directory, i.e., a photo taken on June 3, 2023 at 19:32:37, we first proceed to rename it with the pattern example:
+```
+cd DCIM
+rename-arw example
+```
+The file will be renamed as described below:
+```
+_DSC0270.ARW ---> 20230603193237-example_DSC0270.ARW
+```
+Then after importing it into Lightroom and developing the photo we will have a jpg file in the `OUT` directory with the following name:
+```
+20230603193237-example_DSC0270.jpg
+```
+Now we rename it with the `-j` option of the script:
+```
+cd OUT
+rename-arw -j
+```
+The file will be renamed like this:
+```
+20230603193237-example_DSC0270.jpg ---> 20230603193237-example_1.jpg
+```
+When the directory contains more than one file, the script will produce a counter with a number of digits equal to the number of files in the directory.
+
+For example if the directory contains 100 files we will have the counter at the end of the name with this format:
+```
+001
+002
+...
+100
+```
+
 ## Installation
 > This script will work if the following commands are already in the system: `file`, `cut`, `tr`
 
@@ -40,11 +74,20 @@ sudo chmod +x /usr/local/bin/rename-arw
 ```
 
 ## Usage
-Enter the directory containing ARW files and run the commmand `rename-arw` followed by `<pattern>`.
+
+### ARW mode
+Enter the directory containing `.ARW` files and run the commmand `rename-arw` followed by `<pattern>`.
 ```
 cd <directory-containing-arw>
 rename-arw <pattern>
 ```
+### JPG mode
+Enter the directory containing `.jpg` files and run the commmand `rename-arw -j`.
+```
+cd <directory-containing-jpg>
+rename-arw -j
+```
+
 ## Example
 ![image](https://github.com/signoredellarete/rename-arw/assets/37313214/5dedfa23-6b3d-4284-b641-41f7c584c339)