diff --git a/Cargo.lock b/Cargo.lock
index aeaed65..630dcda 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "aho-corasick"
 version = "0.7.14"
@@ -15,6 +17,12 @@ version = "1.0.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a1fd36ffbb1fb7c834eac128ea8d0e310c5aeb635548f9d58861e1308d46e71c"
 
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
 [[package]]
 name = "fixscreen"
 version = "0.1.0"
@@ -22,6 +30,23 @@ dependencies = [
  "anyhow",
  "regex",
  "thiserror",
+ "xrandr",
+]
+
+[[package]]
+name = "hashbrown"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+
+[[package]]
+name = "indexmap"
+version = "1.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1885e79c1fc4b10f0e172c475f458b7f7b93061064d98c3293e98c5ba0c8b399"
+dependencies = [
+ "autocfg",
+ "hashbrown",
 ]
 
 [[package]]
@@ -30,12 +55,24 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
+[[package]]
+name = "libc"
+version = "0.2.139"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "201de327520df007757c1f0adce6e827fe8562fbc28bfd9c15571c66ca1f5f79"
+
 [[package]]
 name = "memchr"
 version = "2.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
 
+[[package]]
+name = "pkg-config"
+version = "0.3.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ac9a59f73473f1b8d852421e59e64809f025994837ef743615c6d0c5b305160"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.24"
@@ -85,18 +122,18 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.21"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "318234ffa22e0920fe9a40d7b8369b5f649d490980cf7aadcf1eb91594869b42"
+checksum = "6a9cd18aa97d5c45c6603caea1da6628790b37f7a34b6ca89522331c5180fed0"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.21"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cae2447b6282786c3493999f40a9be2a6ad20cb8bd268b0a0dbf5a065535c0ab"
+checksum = "1fb327af4685e4d03fa8cbcf1716380da910eeb2bb8be417e7f9fd3fb164f36f"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -117,3 +154,24 @@ name = "unicode-xid"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
+
+[[package]]
+name = "x11"
+version = "2.21.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "502da5464ccd04011667b11c435cb992822c2c0dbde1770c988480d312a0db2e"
+dependencies = [
+ "libc",
+ "pkg-config",
+]
+
+[[package]]
+name = "xrandr"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e9faecbb5f354fe09959775758b6f7b6524ee80103a6c5c66a57112a2f707862"
+dependencies = [
+ "indexmap",
+ "thiserror",
+ "x11",
+]
diff --git a/Cargo.toml b/Cargo.toml
index 9688af2..a714376 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,3 +10,4 @@ edition = "2018"
 thiserror = "1.0.21"
 anyhow = "1.0.33"
 regex = "1.4.2"
+xrandr = "0.1.1"
diff --git a/src/lib.rs b/src/lib.rs
index 9157e97..7750ee6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -9,6 +9,59 @@ use std::{
 
 use regex::Regex;
 use thiserror::Error;
+use xrandr::{XHandle, XrandrError};
+
+pub fn swap_workspaces(cfg: &Config) -> Result<Vec<Result<Output, CommandError>>, CommandError> {
+    let monitors = XHandle::open()?.monitors()?;
+
+    // TODO(wathiede): if I ever get two monitors with the same resolution, use EDID to find a
+    // better key.
+    let map: HashMap<_, _> = monitors
+        .iter()
+        .map(|m| ((m.width_px as usize, m.height_px as usize), m.name.clone()))
+        .collect();
+    // TODO(wathiede):
+    // i3-msg commands to move them.
+    // Example:
+    // i3-msg '[workspace="trustee"]' move workspace to output DP-0
+    Ok(cfg
+        .screens
+        .iter()
+        .map(|s| {
+            let key = match s.orientation {
+                Orientation::None | Orientation::Invert => {
+                    (s.resolution.width, s.resolution.height)
+                }
+                Orientation::Left | Orientation::Right => (s.resolution.height, s.resolution.width),
+            };
+            if let Some(m) = map.get(&key) {
+                println!("Moving {:?} to {}", s.workspaces, m);
+                run_move_workspace_cmd(&s.workspaces, m)
+            } else {
+                Vec::new()
+            }
+        })
+        .flatten()
+        .collect())
+}
+fn run_move_workspace_cmd(
+    workspaces: &[String],
+    monitor: &str,
+) -> Vec<Result<Output, CommandError>> {
+    workspaces
+        .iter()
+        .map(|workspace| {
+            let s = format!(r#"'[workspace="{monitor}"]'"#);
+            let args = vec!["i3-msg", &s, "move", "workspace", "to", workspace];
+            if cfg!(debug_assertions) {
+                Command::new("echo").args(args).output()
+            } else {
+                Command::new(&args[0]).args(&args[1..]).output()
+            }
+        })
+        .map(|r| r.map_err(CommandError::from))
+        .collect()
+}
 
 #[derive(Error, Debug)]
 pub enum ParseError {
@@ -16,6 +69,8 @@ pub enum ParseError {
     Io(#[from] io::Error),
     #[error("invalid data: {0}")]
     Parse(String),
+    #[error("xrandr: {0}")]
+    XrandrError(#[from] XrandrError),
 }
 
 // Map monitor name to DFP connection.
@@ -43,20 +98,23 @@ pub enum CommandError {
     MissingMonitor(String),
     #[error("error executing command")]
     Io(#[from] io::Error),
+    #[error("xrandr error: {0}")]
+    XrandrError(#[from] XrandrError),
 }
 
-#[derive(Debug, Default)]
+#[derive(Clone, Debug, Default)]
 pub struct Resolution {
     pub width: usize,
     pub height: usize,
 }
 
-#[derive(Debug, Default)]
+#[derive(Clone, Debug, Default)]
 pub struct Offset {
     pub x: isize,
     pub y: isize,
 }
 
+#[derive(Clone)]
 pub enum Orientation {
     None,
     Right,
@@ -80,12 +138,14 @@ impl fmt::Debug for Orientation {
     }
 }
 
-#[derive(Debug, Default)]
+#[derive(Clone, Debug, Default)]
 pub struct Screen {
     pub name: String,
     pub resolution: Resolution,
     pub offset: Offset,
     pub orientation: Orientation,
+    pub primary: bool,
+    pub workspaces: Vec<String>,
 }
 
 impl Screen {
@@ -119,16 +179,16 @@ impl Screen {
         ))
         /*
         Ok(format!("{connection}: {w}x{h} @{in_w}x{in_h} {x:+}{y:+} {{ForceCompositionPipeline=On, ViewPortIn={in_w}x{in_h}, ViewPortOut={w}x{h}+0+0, Rotation={rotation}}}",
-                connection=connection,
-                w=width,
-                h=height,
-                in_w=in_w,
-                in_h=in_h,
-                x=x,
-                y=y,
-                rotation=rotation,
+        connection=connection,
+        w=width,
+        h=height,
+        in_w=in_w,
+        in_h=in_h,
+        x=x,
+        y=y,
+        rotation=rotation,
         ))
-            */
+        */
     }
 }
 
@@ -137,7 +197,7 @@ pub struct Config {
     pub screens: Vec<Screen>,
 }
 
-pub fn run_cmd(screen_mapping: &ScreenMapping, cfg: Config) -> Result<Output, CommandError> {
+pub fn run_cmd(screen_mapping: &ScreenMapping, cfg: &Config) -> Result<Output, CommandError> {
     let args = build_cmd_args(screen_mapping, cfg)?;
     if cfg!(debug_assertions) {
         Ok(Command::new("echo").args(args).output()?)
@@ -148,7 +208,7 @@ pub fn run_cmd(screen_mapping: &ScreenMapping, cfg: Config) -> Result<Output, Co
 
 fn build_cmd_args(
     screen_mapping: &ScreenMapping,
-    cfg: Config,
+    cfg: &Config,
 ) -> Result<Vec<String>, CommandError> {
     let metamode = cfg
         .screens
diff --git a/src/main.rs b/src/main.rs
index 13427fd..d383f52 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -13,6 +13,7 @@ fn main() -> Result<()> {
             y: 1440 * 2 - 1920,
         },
         orientation: Orientation::Left,
+        workspaces: vec!["distortion".to_string()],
         ..Default::default()
     };
     let lg = Screen {
@@ -29,6 +30,7 @@ fn main() -> Result<()> {
             x: 1 + dell.resolution.height as isize,
             y: 0,
         },
+        workspaces: vec!["virtue".to_string()],
         ..Default::default()
     };
     let lenovo = Screen {
@@ -41,15 +43,24 @@ fn main() -> Result<()> {
             x: (dell.resolution.height + (lg.resolution.width - 2560) / 2) as isize,
             y: (lg.resolution.height) as isize,
         },
+        primary: true,
+        workspaces: vec!["fraud".to_string(), "twilight".to_string()],
         ..Default::default()
     };
+    let screens = vec![dell, lg, lenovo];
     let cfg = Config {
-        screens: vec![dell, lg, lenovo],
+        screens: screens.clone(),
     };
 
     let map = screen_mapping_from_xorg_log("/var/log/X.0.log")?;
-    let cmd = run_cmd(&map, cfg)?;
+    let cmd = run_cmd(&map, &cfg)?;
     println!("cmd {:#?}", cmd);
+    // TODO(wathiede): run xrandr --output $DPY --primary
+    // TODO(wathiede): i3-msg to move workspaces to proper places.
+    let res = swap_workspaces(&cfg)?;
+    for r in res {
+        println!("r = {:?}", r);
+    }
 
     Ok(())
 }