What: Create a split window in Vim with arbitrary content
Why: Displaying information easily along text your are editing
How: Use Vimscript

A simple Vimscript script

Create a file test.vim with the following content. It defines a function which creates a new buffer, adds text to it and show it in a split window on the right.

Use the defined function

There are multiple ways, the function can be used. You can create a plugin (see https://learnvimscriptthehardway.stevelosh.com/chapters/41.html) or call the function from within Vim:

What: Convert raw camera images (like in CR2 format) to jpeg
Why: Smaller image size and easier handling in other programms
How: Use dcraw and pnmtojpeg in Debian

Installation of tools

Small script to iterate over the raw image directory