diff --git a/Cargo.lock b/Cargo.lock
index 37cb90c..46d8086 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -8,6 +8,15 @@ version = "1.0.51"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b26702f315f53b6071259e15dd9d64528213b44d61de1ec926eca7715d62203"
 
+[[package]]
+name = "approx"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cab112f0a86d568ea0e627cc1d6be74a1e9cd55214684db5561995f6dad897c6"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.0.1"
@@ -20,6 +29,12 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "bytemuck"
+version = "1.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "439989e6b8c38d1b6570a384ef1e49c8848128f5a97f3914baef02920842712f"
+
 [[package]]
 name = "cairo-rs"
 version = "0.15.1"
@@ -53,6 +68,12 @@ dependencies = [
  "smallvec",
 ]
 
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
 [[package]]
 name = "field-offset"
 version = "0.3.4"
@@ -67,6 +88,7 @@ dependencies = [
 name = "focus-annotator"
 version = "0.1.0"
 dependencies = [
+ "gls",
  "gtk4",
  "libadwaita",
 ]
@@ -211,6 +233,17 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "gl_generator"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a95dfc23a2b4a9a2f5ab41d194f8bfda3cabec42af4e39f08c339eb2a0c124d"
+dependencies = [
+ "khronos_api",
+ "log",
+ "xml-rs",
+]
+
 [[package]]
 name = "glib"
 version = "0.15.2"
@@ -256,6 +289,19 @@ dependencies = [
  "system-deps",
 ]
 
+[[package]]
+name = "gls"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02e3ad781e06138bd79362ba641edcc6f85470f84a9e07af741ba44e144a66c1"
+dependencies = [
+ "gl_generator",
+ "libc",
+ "nalgebra",
+ "serde",
+ "winapi",
+]
+
 [[package]]
 name = "gobject-sys"
 version = "0.15.1"
@@ -393,6 +439,12 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2540771e65fc8cb83cd6e8a237f70c319bd5c29f78ed1084ba5d50eeac86f7f9"
 
+[[package]]
+name = "khronos_api"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2db585e1d738fc771bf08a151420d3ed193d9d895a36df7f6f8a9456b911ddc"
+
 [[package]]
 name = "libadwaita"
 version = "0.1.0"
@@ -431,6 +483,24 @@ version = "0.2.112"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1b03d17f364a3a042d5e5d46b053bbbf82c92c9430c592dd4c064dc6ee997125"
 
+[[package]]
+name = "log"
+version = "0.4.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "matrixmultiply"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "add85d4dd35074e6fedc608f8c8f513a3548619a9024b751949ef0e8e45a4d84"
+dependencies = [
+ "rawpointer",
+]
+
 [[package]]
 name = "memoffset"
 version = "0.6.5"
@@ -440,6 +510,74 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "nalgebra"
+version = "0.30.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fb2d0de08694bed883320212c18ee3008576bfe8c306f4c3c4a58b4876998be"
+dependencies = [
+ "approx",
+ "matrixmultiply",
+ "nalgebra-macros",
+ "num-complex",
+ "num-rational",
+ "num-traits",
+ "serde",
+ "simba",
+ "typenum",
+]
+
+[[package]]
+name = "nalgebra-macros"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "01fcc0b8149b4632adc89ac3b7b31a12fb6099a0317a4eb2ebff574ef7de7218"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "num-complex"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26873667bbbb7c5182d4a37c1add32cdf09f841af72da53318fdb81543c15085"
+dependencies = [
+ "num-traits",
+ "serde",
+]
+
+[[package]]
+name = "num-integer"
+version = "0.1.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2cc698a63b549a70bc047073d2949cce27cd1c7b0a4a862d08a8031bc2801db"
+dependencies = [
+ "autocfg",
+ "num-traits",
+]
+
+[[package]]
+name = "num-rational"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d41702bd167c2df5520b384281bc111a4b5efcf7fbc4c9c222c815b07e0a6a6a"
+dependencies = [
+ "autocfg",
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a64b1ec5cda2586e284722486d802acf1f7dbdc623e2bfc57e65ca1cd099290"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "once_cell"
 version = "1.9.0"
@@ -471,6 +609,12 @@ dependencies = [
  "system-deps",
 ]
 
+[[package]]
+name = "paste"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0744126afe1a6dd7f394cb50a716dbe086cb06e255e53d8d0185d82828358fb5"
+
 [[package]]
 name = "pest"
 version = "2.1.3"
@@ -550,6 +694,12 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "rawpointer"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60a357793950651c4ed0f3f52338f53b2f809f32d83a07f72909fa13e4c6c1e3"
+
 [[package]]
 name = "rustc_version"
 version = "0.3.3"
@@ -559,6 +709,15 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "safe_arch"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "794821e4ccb0d9f979512f9c1973480123f9bd62a90d74ab0f9426fcf8f4a529"
+dependencies = [
+ "bytemuck",
+]
+
 [[package]]
 name = "semver"
 version = "0.11.0"
@@ -582,6 +741,33 @@ name = "serde"
 version = "1.0.132"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b9875c23cf305cd1fd7eb77234cbb705f21ea6a72c637a5c6db5fe4b8e7f008"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.132"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ecc0db5cb2556c0e558887d9bbdcf6ac4471e83ff66cf696e5419024d1606276"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "simba"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6fa406d0a270fc91831a28f705ba803ad05b971486af492317f1607390245b99"
+dependencies = [
+ "approx",
+ "num-complex",
+ "num-traits",
+ "paste",
+ "wide",
+]
 
 [[package]]
 name = "slab"
@@ -648,6 +834,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "typenum"
+version = "1.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dcf81ac59edc17cc8697ff311e8f5ef2d99fcbd9817b34cec66f90b6c3dfd987"
+
 [[package]]
 name = "ucd-trie"
 version = "0.1.3"
@@ -678,6 +870,16 @@ version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
 
+[[package]]
+name = "wide"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3aba2d1dac31ac7cae82847ac5b8be822aee8f99a4e100f279605016b185c5f"
+dependencies = [
+ "bytemuck",
+ "safe_arch",
+]
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -699,3 +901,9 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "xml-rs"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2d7d3948613f75c98fd9328cfdcc45acc4d360655289d0a7d4ec931392200a3"
diff --git a/Cargo.toml b/Cargo.toml
index 93bdd3d..47bad50 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,5 +7,6 @@ edition = "2021"
 
 [dependencies]
 adw = { version = "0.1.0", package = "libadwaita" }
-gtk = { version = "0.4.4", package = "gtk4" }
+gtk = { version = "0.4", package = "gtk4" }
+gls = { version = "0.1.6" }
 
diff --git a/src/main.rs b/src/main.rs
index 3a0da32..9d4c2de 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,10 @@
 use adw::{prelude::*, ApplicationWindow, HeaderBar, SplitButton};
+use gio::SimpleAction;
+use glib::clone;
+use gtk::{gio, glib};
 use gtk::{
     prelude::*, ActionBar, Adjustment, Application, AspectFrame, Box, Button, Grid, Image,
-    Orientation, Scale, Separator, ToggleButton,
+    Orientation, PositionType, Scale, Separator, ToggleButton,
 };
 
 const MARGIN_TOP: i32 = 32;
@@ -14,6 +17,8 @@ const NONE_STRING_OPTION: Option<String> = None;
 const TOGGLE_NEIGHBOURS_TEXT_TOGGLED: &str = "Hide Neighbours";
 const TOGGLE_NEIGHBOURS_TEXT: &str = "Show Neighbours";
 
+const SCALE_STEP: f64 = 1.0;
+
 #[derive(Debug, Clone)]
 struct AnnotationImage {
     image_path: String,
@@ -170,7 +175,7 @@ fn main() {
             .lower(0.0)
             .upper(10.0)
             .value(5.0)
-            .step_increment(1.0)
+            .step_increment(SCALE_STEP)
             .build();
 
         let focus_scale = std::sync::Arc::new(
@@ -283,8 +288,52 @@ fn main() {
             // add content to window
             .content(&application_vertical_widget)
             .build();
+
+        ////////////////////////
+        // Keyboard Shortcuts //
+        ////////////////////////
+
+        let action_toggle_neighbour = SimpleAction::new("toggle_neighbour", None);
+        action_toggle_neighbour.connect_activate(clone!(@weak window => move |_, _| {
+            neighbour_toggle_button.set_active(!neighbour_toggle_button.is_active());
+        }));
+
+        let action_focus_scale_increment = SimpleAction::new("increment_focus_scale", None);
+        action_focus_scale_increment.connect_activate(clone!(@strong focus_scale => move |_, _| {
+            focus_scale.set_value(focus_scale.value() + SCALE_STEP);
+        }));
+
+        let action_focus_scale_decrement = SimpleAction::new("decrement_focus_scale", None);
+        action_focus_scale_decrement.connect_activate(clone!(@strong focus_scale => move |_, _| {
+            focus_scale.set_value(focus_scale.value() - SCALE_STEP);
+        }));
+
+        let mark_focus = SimpleAction::new("mark_focus", None);
+        mark_focus.connect_activate(|_, _| {
+            // TODO: implement mark_focus
+            eprintln! {"Focus Set!"};
+        });
+
+        let skip_focus = SimpleAction::new("skip_focus", None);
+        skip_focus.connect_activate(|_, _| {
+            // TODO: implement skip focus
+            eprintln! {"Skip!"};
+        });
+
+        window.add_action(&action_toggle_neighbour);
+        window.add_action(&action_focus_scale_increment);
+        window.add_action(&action_focus_scale_decrement);
+        window.add_action(&mark_focus);
+        window.add_action(&skip_focus);
+
         window.show();
     });
 
+    application.set_accels_for_action("win.toggle_neighbour", &["G"]);
+    application.set_accels_for_action("win.increment_focus_scale", &["W"]);
+    application.set_accels_for_action("win.decrement_focus_scale", &["S"]);
+    application.set_accels_for_action("win.mark_focus", &["M"]);
+    application.set_accels_for_action("win.skip_focus", &["N"]);
+
     application.run();
 }