diff --git a/src/SharpIDE.Godot/Features/BottomPanel/BottomPanelManager.cs b/src/SharpIDE.Godot/Features/BottomPanel/BottomPanelManager.cs
index 84abff4..80748fe 100644
--- a/src/SharpIDE.Godot/Features/BottomPanel/BottomPanelManager.cs
+++ b/src/SharpIDE.Godot/Features/BottomPanel/BottomPanelManager.cs
@@ -4,5 +4,41 @@ namespace SharpIDE.Godot.Features.BottomPanel;
 
 public partial class BottomPanelManager : Panel
 {
+    private Control _runPanel = null!;
+    private Control _buildPanel = null!;
+    private Control _problemsPanel = null!;
+
+    private Dictionary<BottomPanelType, Control> _panelTypeMap = [];
+    private BottomPanelType? _currentPanelType = BottomPanelType.Run;
     
+    public override void _Ready()
+    {
+        _runPanel = GetNode<Control>("%RunPanel");
+        _buildPanel = GetNode<Control>("%BuildPanel");
+        _problemsPanel = GetNode<Control>("%ProblemsPanel");
+        _panelTypeMap = new Dictionary<BottomPanelType, Control>
+        {
+            { BottomPanelType.Run, _runPanel },
+            { BottomPanelType.Build, _buildPanel },
+            { BottomPanelType.Problems, _problemsPanel }
+        };
+
+        GodotGlobalEvents.LeftSideBarButtonClicked += OnLeftSideBarButtonClicked;
+    }
+
+    private async Task OnLeftSideBarButtonClicked(BottomPanelType type)
+    {
+        await this.InvokeAsync(() =>
+        {
+            if (type == _currentPanelType)
+            {
+                _currentPanelType = null;
+                // TODO: Ask parent to to collapse slider.
+            }
+            foreach (var kvp in _panelTypeMap)
+            {
+                kvp.Value.Visible = kvp.Key == type;
+            }
+        });
+    }
 }
\ No newline at end of file
diff --git a/src/SharpIDE.Godot/Features/LeftSideBar/LeftSideBar.cs b/src/SharpIDE.Godot/Features/LeftSideBar/LeftSideBar.cs
new file mode 100644
index 0000000..298bde1
--- /dev/null
+++ b/src/SharpIDE.Godot/Features/LeftSideBar/LeftSideBar.cs
@@ -0,0 +1,23 @@
+using Godot;
+
+namespace SharpIDE.Godot.Features.LeftSideBar;
+
+public partial class LeftSideBar : Panel
+{
+    private Button _slnExplorerButton = null!;
+    private Button _problemsButton = null!;
+    private Button _runButton = null!;
+    private Button _buildButton = null!;
+    
+    public override void _Ready()
+    {
+        _slnExplorerButton = GetNode<Button>("%SlnExplorerButton");
+        _problemsButton = GetNode<Button>("%ProblemsButton");
+        _runButton = GetNode<Button>("%RunButton");
+        _buildButton = GetNode<Button>("%BuildButton");
+        
+        _problemsButton.Pressed += () => GodotGlobalEvents.InvokeLeftSideBarButtonClicked(BottomPanelType.Problems);
+        _runButton.Pressed += () => GodotGlobalEvents.InvokeLeftSideBarButtonClicked(BottomPanelType.Run);
+        _buildButton.Pressed += () => GodotGlobalEvents.InvokeLeftSideBarButtonClicked(BottomPanelType.Build);
+    }
+}
\ No newline at end of file
diff --git a/src/SharpIDE.Godot/Features/LeftSideBar/LeftSideBar.cs.uid b/src/SharpIDE.Godot/Features/LeftSideBar/LeftSideBar.cs.uid
new file mode 100644
index 0000000..836c8b5
--- /dev/null
+++ b/src/SharpIDE.Godot/Features/LeftSideBar/LeftSideBar.cs.uid
@@ -0,0 +1 @@
+uid://bddno1bbvvp5q
diff --git a/src/SharpIDE.Godot/Features/LeftSideBar/LeftSideBar.tscn b/src/SharpIDE.Godot/Features/LeftSideBar/LeftSideBar.tscn
index e6eef1d..e97e127 100644
--- a/src/SharpIDE.Godot/Features/LeftSideBar/LeftSideBar.tscn
+++ b/src/SharpIDE.Godot/Features/LeftSideBar/LeftSideBar.tscn
@@ -1,6 +1,7 @@
-[gd_scene load_steps=2 format=3 uid="uid://biyhfwx36ium8"]
+[gd_scene load_steps=3 format=3 uid="uid://biyhfwx36ium8"]
 
 [ext_resource type="Texture2D" uid="uid://bkty6563cthj8" path="res://Features/Run/Resources/Run.svg" id="1_6wc7d"]
+[ext_resource type="Script" uid="uid://bddno1bbvvp5q" path="res://Features/LeftSideBar/LeftSideBar.cs" id="1_rgaf0"]
 
 [node name="LeftSideBar" type="Panel"]
 custom_minimum_size = Vector2(80, 0)
@@ -10,6 +11,7 @@ anchor_right = 0.5
 anchor_bottom = 1.0
 grow_horizontal = 2
 grow_vertical = 2
+script = ExtResource("1_rgaf0")
 
 [node name="MarginContainer" type="MarginContainer" parent="."]
 layout_mode = 1
@@ -25,7 +27,8 @@ theme_override_constants/margin_bottom = 5
 layout_mode = 2
 size_flags_horizontal = 4
 
-[node name="ExplorerButton" type="Button" parent="MarginContainer/VBoxContainer"]
+[node name="SlnExplorerButton" type="Button" parent="MarginContainer/VBoxContainer"]
+unique_name_in_owner = true
 layout_mode = 2
 focus_mode = 0
 theme_override_font_sizes/font_size = 13
@@ -41,6 +44,7 @@ layout_mode = 2
 size_flags_vertical = 3
 
 [node name="ProblemsButton" type="Button" parent="MarginContainer/VBoxContainer"]
+unique_name_in_owner = true
 layout_mode = 2
 focus_mode = 0
 theme_override_font_sizes/font_size = 13
@@ -52,6 +56,7 @@ vertical_icon_alignment = 0
 expand_icon = true
 
 [node name="RunButton" type="Button" parent="MarginContainer/VBoxContainer"]
+unique_name_in_owner = true
 layout_mode = 2
 focus_mode = 0
 theme_override_font_sizes/font_size = 13
@@ -63,6 +68,7 @@ vertical_icon_alignment = 0
 expand_icon = true
 
 [node name="BuildButton" type="Button" parent="MarginContainer/VBoxContainer"]
+unique_name_in_owner = true
 layout_mode = 2
 focus_mode = 0
 theme_override_font_sizes/font_size = 13
diff --git a/src/SharpIDE.Godot/Features/Problems/ProblemsPanel.tscn b/src/SharpIDE.Godot/Features/Problems/ProblemsPanel.tscn
new file mode 100644
index 0000000..1c30411
--- /dev/null
+++ b/src/SharpIDE.Godot/Features/Problems/ProblemsPanel.tscn
@@ -0,0 +1,9 @@
+[gd_scene format=3 uid="uid://tqpmww430cor"]
+
+[node name="ProblemsPanel" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
diff --git a/src/SharpIDE.Godot/GodotGlobalEvents.cs b/src/SharpIDE.Godot/GodotGlobalEvents.cs
new file mode 100644
index 0000000..1cbb0f9
--- /dev/null
+++ b/src/SharpIDE.Godot/GodotGlobalEvents.cs
@@ -0,0 +1,14 @@
+namespace SharpIDE.Godot;
+
+public static class GodotGlobalEvents
+{
+    public static event Func<BottomPanelType, Task> LeftSideBarButtonClicked = _ => Task.CompletedTask;
+    public static void InvokeLeftSideBarButtonClicked(BottomPanelType type) => LeftSideBarButtonClicked?.Invoke(type);
+}
+
+public enum BottomPanelType
+{
+    Run,
+    Build,
+    Problems
+}
\ No newline at end of file
diff --git a/src/SharpIDE.Godot/GodotGlobalEvents.cs.uid b/src/SharpIDE.Godot/GodotGlobalEvents.cs.uid
new file mode 100644
index 0000000..bd0e84e
--- /dev/null
+++ b/src/SharpIDE.Godot/GodotGlobalEvents.cs.uid
@@ -0,0 +1 @@
+uid://dgws4lmqv2bsf
diff --git a/src/SharpIDE.Godot/IdeRoot.tscn b/src/SharpIDE.Godot/IdeRoot.tscn
index e3a38fe..700abaa 100644
--- a/src/SharpIDE.Godot/IdeRoot.tscn
+++ b/src/SharpIDE.Godot/IdeRoot.tscn
@@ -1,4 +1,4 @@
-[gd_scene load_steps=12 format=3 uid="uid://b2oniigcp5ew5"]
+[gd_scene load_steps=13 format=3 uid="uid://b2oniigcp5ew5"]
 
 [ext_resource type="Script" uid="uid://bavypuy7b375x" path="res://IdeRoot.cs" id="1_whawi"]
 [ext_resource type="Texture2D" uid="uid://bkty6563cthj8" path="res://Features/Run/Resources/Run.svg" id="2_8x8ub"]
@@ -10,6 +10,7 @@
 [ext_resource type="PackedScene" uid="uid://bcoytt3bw0gpe" path="res://Features/Run/RunPanel.tscn" id="5_y3aoi"]
 [ext_resource type="Script" uid="uid://cvvgp42r3nml8" path="res://Features/BottomPanel/BottomPanelManager.cs" id="7_i62lx"]
 [ext_resource type="PackedScene" uid="uid://co6dkhdolriej" path="res://Features/Build/BuildPanel.tscn" id="9_rllbf"]
+[ext_resource type="PackedScene" uid="uid://tqpmww430cor" path="res://Features/Problems/ProblemsPanel.tscn" id="11_b7c1a"]
 
 [sub_resource type="FontVariation" id="FontVariation_y3aoi"]
 base_font = ExtResource("2_rk34b")
@@ -153,10 +154,16 @@ script = ExtResource("7_i62lx")
 
 [node name="RunPanel" parent="VBoxContainer/HBoxContainer/VSplitContainer/BottomPanel" instance=ExtResource("5_y3aoi")]
 unique_name_in_owner = true
-visible = false
 layout_mode = 1
 
 [node name="BuildPanel" parent="VBoxContainer/HBoxContainer/VSplitContainer/BottomPanel" instance=ExtResource("9_rllbf")]
+unique_name_in_owner = true
+visible = false
+layout_mode = 1
+
+[node name="ProblemsPanel" parent="VBoxContainer/HBoxContainer/VSplitContainer/BottomPanel" instance=ExtResource("11_b7c1a")]
+unique_name_in_owner = true
+visible = false
 layout_mode = 1
 
 [node name="OpenSolutionDialog" type="FileDialog" parent="."]