Update README.md

Author: nick-shmyrev

README.md

@@ -46,9 +46,29 @@ You'll need to follow the manual installation process from [README](https://gith
 but before running `package-extension.sh` you'll have to make changes to your preferred layout
 (see [osk-layouts](https://github.com/nick-shmyrev/improved-osk-gnome-ext/tree/master/src/data/osk-layouts)), then continue with the installation process.
 
-### Some symbols are missing...
-The keyboard uses unicode characters, try installing `ttf-symbola` on archlinux (AUR)
-or `ttf-ancient-fonts-symbola` on ubuntu/debian
+### I want to test this extension with a new version of Gnome.
+To install the extension on an unsupported Gnome version, you can either add desired version number to `metadata.json` file and proceed with a manual installation,
+or disable extension version check and then install from [extensions.gnome.org](https://extensions.gnome.org/extension/4413/improved-osk/):
+
+```console
+gsettings set org.gnome.shell disable-extension-version-validation true
+```
+
+Here are some of the test cases:
+- OSK shows up when you click/tap text inputs and/or terminal window
+- OSK can type lowercase chars
+- Tapping "Shift" switches OSK to uppercase layer
+- OSK can type uppercase chars
+- After typing an uppercase char, OSK switches back to lowercase layer
+- Once switched to Numbers layer, it stays latched until user switches to another layer
+- Long-pressing characters like "1" shows a popup with additional chars, typing those chars works
+- Tapping "Ctrl", "Alt", "Shift" adds highlight to those buttons
+- "Ctrl" and/or "Alt" remain latched when "Shift" is toggled on/off
+- Key combinations like "Ctrl + C", "Ctrl + X", "Ctrl + V", "Ctrl + A", "Ctrl + Z", "Ctrl + Shift + Z", "Ctrl + Shift + V" (in terminal), "Alt + Tab" work as expected
+- Esc, F1-12 keys work as expected
+- OSK works in Gnome password modal
+- OSK works on lock-screen
+- OSK settings for landscape/portrait height work
 
 ### Do I need to enable the OSK in Gnome accessibility settings?
 By default, the keyboard will pop up on touch input events.
@@ -58,3 +78,7 @@ to force the OSK to appear on non-touch events.
 ### Extension is installed and activated, but keyboard layout doesn't change.
 Gnome's default on-screen keyboard, on which this extension is based on,
 uses `ibus` package, make sure you have it installed.
+
+### Some symbols are missing...
+The keyboard uses unicode characters, try installing `ttf-symbola` on archlinux (AUR)
+or `ttf-ancient-fonts-symbola` on ubuntu/debian