Update README and screenshot

README.md

@@ -5,7 +5,9 @@
 wdisplays is a graphical application for configuring displays in Wayland
 compositors. It borrows some code from [kanshi]. It should work in any
 compositor that implements the wlr-output-management-unstable-v1 protocol,
-including [sway].
+including [sway]. The goal of this project is to allow precise adjustment of
+display settings in kiosks, digital signage, and other elaborate multi-monitor
+setups.
 
 ![Screenshot](wdisplays.png)
 
@@ -13,6 +15,7 @@ including [sway].
 
 Build requirements are:
 
+- meson
 - GTK+3
 - epoxy
 - wayland-client
@@ -23,6 +26,28 @@ ninja -C build
 sudo ninja -C build install
 ```
 
+Binaries are not available. Only building from source is supported, and only
+if you're using wlroots compiled from master.
+
+# Usage
+
+Displays can be moved around the virtual screen space by clicking and dragging
+them in the preview on the left panel. By default, they will snap to one
+another. Hold Shift while dragging to disable snapping. You can click and drag
+with the middle mouse button to pan. Zoom in and out either with the buttons on
+the top left, or by holding Ctrl and scrolling the mouse wheel. Fine tune your
+adjustments in the right panel, then click apply.
+
+There are some options available by clicking the menu button on the top left:
+
+- Automatically Apply Changes: Makes it so you don't have to hit apply. Disable
+  this for making minor adjustments, but be careful, you may end up with an
+  unusable setup.
+- Show Screen Contents: Shows a live preview of the screens in the left panel.
+  Turn off to reduce energy usage.
+- Overlay Screen Names: Shows big names in the corner of all screens for easy
+  identification. Disable if they get in the way.
+
 # FAQ (Fervently Anticpiated Quandaries)
 
 ### What is this?

resources/wdisplays.ui

@@ -56,7 +56,7 @@
             <property name="can_focus">True</property>
             <property name="receives_default">True</property>
             <property name="action_name">app.show-overlay</property>
-            <property name="text" translatable="yes">Show Numbers on Screens</property>
+            <property name="text" translatable="yes">Overlay Screen Names</property>
           </object>
           <packing>
             <property name="expand">False</property>