Updated RGUI (markdown)

RGUI.md

@@ -74,6 +74,12 @@ Regular input binds will apply, and binds here are defined in terms of the Retro
 - **Up/Down D-pad** (Default PC: Up/Down keys): Browse settings/files
 - **Left/Right D-pad** (Default PC: Left/Right keys): Toggle settings, or browse several items at once in file browser.
 
+### Searching through lists with keyboard
+When using a keyboard, it can be slow to navigate a large list using gamepad-like controls.
+To help this, you can type `/` (forward slash) at any time to bring up a search-box. Type a search string and hit return. The cursor should jump to the first entry that matches. The search will match mid-path strings. However, if a match is found at the beginning of the path, like when searching for first letter, the start-of-path match will take priority.
+
+The forward slash is recognized on character basis, not on the key itself. This allows e.g. norwegian layouts to type forward slash using shift + 7. Characters which are outside the ASCII set are recognized but ignored as RGUI cannot render such characters anyways.
+
 ## Starting a game
 To load a game you need a libretro core to use, and a ROM.
 Selecting `Core` from top menu, you can browse for a libretro implementation.