To disable ignoring case enter:  

> :set noic

To perform one case-insensitive search, enter:

> /keyword\c

# Split Screen

Make a horizontal split with:

> :sp

Or a vertical split with:

> :vsp

Then place window-commands with Ctrl+w.

|Command | Key |
|:-------|:---:|
|Down|j|
|Up|k|
|Quit current windows| q |
|Rotate window positions | r / R|
|Enlarge/ shrink window | +/- |