diff --git a/Form1.Designer.cs b/Form1.Designer.cs
index d891086..aed7a26 100644
--- a/Form1.Designer.cs
+++ b/Form1.Designer.cs
@@ -28,15 +28,10 @@
         /// </summary>
         private void InitializeComponent()
         {
-            panel1 = new Panel();
-            groupBox3 = new GroupBox();
-            button2 = new Button();
-            textBox2 = new TextBox();
-            groupBox2 = new GroupBox();
-            button1 = new Button();
-            textBox1 = new TextBox();
             menuStrip1 = new MenuStrip();
             fileToolStripMenuItem = new ToolStripMenuItem();
+            openDevToolsToolStripMenuItem = new ToolStripMenuItem();
+            exitToolStripMenuItem = new ToolStripMenuItem();
             helpToolStripMenuItem = new ToolStripMenuItem();
             aboutToolStripMenuItem = new ToolStripMenuItem();
             renderToolStripMenuItem = new ToolStripMenuItem();
@@ -47,93 +42,18 @@
             Opener = new OpenFileDialog();
             Saver = new SaveFileDialog();
             groupBox4 = new GroupBox();
+            progressBar1 = new ProgressBar();
             chromiumWebBrowser1 = new CefSharp.WinForms.ChromiumWebBrowser();
             button4 = new Button();
-            progressBar1 = new ProgressBar();
             button3 = new Button();
-            panel1.SuspendLayout();
-            groupBox3.SuspendLayout();
-            groupBox2.SuspendLayout();
+            groupBox3 = new GroupBox();
+            button2 = new Button();
+            textBox2 = new TextBox();
             menuStrip1.SuspendLayout();
             groupBox4.SuspendLayout();
+            groupBox3.SuspendLayout();
             SuspendLayout();
             // 
-            // panel1
-            // 
-            panel1.Controls.Add(groupBox3);
-            panel1.Controls.Add(groupBox2);
-            panel1.Dock = DockStyle.Top;
-            panel1.Location = new Point(0, 24);
-            panel1.Name = "panel1";
-            panel1.Size = new Size(800, 67);
-            panel1.TabIndex = 1;
-            // 
-            // groupBox3
-            // 
-            groupBox3.Controls.Add(button2);
-            groupBox3.Controls.Add(textBox2);
-            groupBox3.Dock = DockStyle.Fill;
-            groupBox3.Location = new Point(401, 0);
-            groupBox3.Name = "groupBox3";
-            groupBox3.Size = new Size(399, 67);
-            groupBox3.TabIndex = 2;
-            groupBox3.TabStop = false;
-            groupBox3.Text = "Input file";
-            // 
-            // button2
-            // 
-            button2.Dock = DockStyle.Fill;
-            button2.FlatStyle = FlatStyle.System;
-            button2.Location = new Point(3, 42);
-            button2.Name = "button2";
-            button2.Size = new Size(393, 22);
-            button2.TabIndex = 3;
-            button2.Text = "Select file";
-            button2.UseVisualStyleBackColor = true;
-            button2.Click += button2_Click;
-            // 
-            // textBox2
-            // 
-            textBox2.Dock = DockStyle.Top;
-            textBox2.Location = new Point(3, 19);
-            textBox2.Name = "textBox2";
-            textBox2.PlaceholderText = "Type path or select file below. ";
-            textBox2.Size = new Size(393, 23);
-            textBox2.TabIndex = 2;
-            // 
-            // groupBox2
-            // 
-            groupBox2.Controls.Add(button1);
-            groupBox2.Controls.Add(textBox1);
-            groupBox2.Dock = DockStyle.Left;
-            groupBox2.Location = new Point(0, 0);
-            groupBox2.Name = "groupBox2";
-            groupBox2.Size = new Size(401, 67);
-            groupBox2.TabIndex = 1;
-            groupBox2.TabStop = false;
-            groupBox2.Text = "Output file";
-            // 
-            // button1
-            // 
-            button1.Dock = DockStyle.Fill;
-            button1.FlatStyle = FlatStyle.System;
-            button1.Location = new Point(3, 42);
-            button1.Name = "button1";
-            button1.Size = new Size(395, 22);
-            button1.TabIndex = 1;
-            button1.Text = "Select path";
-            button1.UseVisualStyleBackColor = true;
-            button1.Click += button1_Click;
-            // 
-            // textBox1
-            // 
-            textBox1.Dock = DockStyle.Top;
-            textBox1.Location = new Point(3, 19);
-            textBox1.Name = "textBox1";
-            textBox1.PlaceholderText = "Type path or select path below. ";
-            textBox1.Size = new Size(395, 23);
-            textBox1.TabIndex = 0;
-            // 
             // menuStrip1
             // 
             menuStrip1.Items.AddRange(new ToolStripItem[] { fileToolStripMenuItem, helpToolStripMenuItem, renderToolStripMenuItem });
@@ -146,10 +66,24 @@
             // 
             // fileToolStripMenuItem
             // 
+            fileToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { openDevToolsToolStripMenuItem, exitToolStripMenuItem });
             fileToolStripMenuItem.Name = "fileToolStripMenuItem";
             fileToolStripMenuItem.Size = new Size(37, 20);
             fileToolStripMenuItem.Text = "File";
             // 
+            // openDevToolsToolStripMenuItem
+            // 
+            openDevToolsToolStripMenuItem.Name = "openDevToolsToolStripMenuItem";
+            openDevToolsToolStripMenuItem.Size = new Size(154, 22);
+            openDevToolsToolStripMenuItem.Text = "Open DevTools";
+            openDevToolsToolStripMenuItem.Click += openDevToolsToolStripMenuItem_Click_1;
+            // 
+            // exitToolStripMenuItem
+            // 
+            exitToolStripMenuItem.Name = "exitToolStripMenuItem";
+            exitToolStripMenuItem.Size = new Size(154, 22);
+            exitToolStripMenuItem.Text = "Exit";
+            // 
             // helpToolStripMenuItem
             // 
             helpToolStripMenuItem.Alignment = ToolStripItemAlignment.Right;
@@ -176,28 +110,31 @@
             // 
             fontFamilyToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { serifToolStripMenuItem, sansSerifToolStripMenuItem, forceMonospaceToolStripMenuItem });
             fontFamilyToolStripMenuItem.Name = "fontFamilyToolStripMenuItem";
-            fontFamilyToolStripMenuItem.Size = new Size(136, 22);
+            fontFamilyToolStripMenuItem.Size = new Size(180, 22);
             fontFamilyToolStripMenuItem.Text = "Font Family";
             // 
             // serifToolStripMenuItem
             // 
             serifToolStripMenuItem.Name = "serifToolStripMenuItem";
-            serifToolStripMenuItem.Size = new Size(176, 22);
+            serifToolStripMenuItem.Size = new Size(180, 22);
             serifToolStripMenuItem.Text = "Serif";
+            serifToolStripMenuItem.Click += serifToolStripMenuItem_Click;
             // 
             // sansSerifToolStripMenuItem
             // 
             sansSerifToolStripMenuItem.Checked = true;
             sansSerifToolStripMenuItem.CheckState = CheckState.Checked;
             sansSerifToolStripMenuItem.Name = "sansSerifToolStripMenuItem";
-            sansSerifToolStripMenuItem.Size = new Size(176, 22);
+            sansSerifToolStripMenuItem.Size = new Size(180, 22);
             sansSerifToolStripMenuItem.Text = "(Default) Sans serif";
+            sansSerifToolStripMenuItem.Click += sansSerifToolStripMenuItem_Click;
             // 
             // forceMonospaceToolStripMenuItem
             // 
             forceMonospaceToolStripMenuItem.Name = "forceMonospaceToolStripMenuItem";
-            forceMonospaceToolStripMenuItem.Size = new Size(176, 22);
+            forceMonospaceToolStripMenuItem.Size = new Size(180, 22);
             forceMonospaceToolStripMenuItem.Text = "(Force) Monospace";
+            forceMonospaceToolStripMenuItem.Click += forceMonospaceToolStripMenuItem_Click;
             // 
             // Opener
             // 
@@ -219,10 +156,20 @@
             groupBox4.Dock = DockStyle.Fill;
             groupBox4.Location = new Point(0, 91);
             groupBox4.Name = "groupBox4";
-            groupBox4.Size = new Size(800, 401);
+            groupBox4.Size = new Size(800, 378);
             groupBox4.TabIndex = 3;
             groupBox4.TabStop = false;
             groupBox4.Text = "Preview";
+            groupBox4.Enter += groupBox4_Enter;
+            // 
+            // progressBar1
+            // 
+            progressBar1.Dock = DockStyle.Top;
+            progressBar1.Location = new Point(3, 42);
+            progressBar1.Name = "progressBar1";
+            progressBar1.Size = new Size(794, 5);
+            progressBar1.Style = ProgressBarStyle.Marquee;
+            progressBar1.TabIndex = 2;
             // 
             // chromiumWebBrowser1
             // 
@@ -230,13 +177,14 @@
             chromiumWebBrowser1.Dock = DockStyle.Fill;
             chromiumWebBrowser1.Location = new Point(3, 42);
             chromiumWebBrowser1.Name = "chromiumWebBrowser1";
-            chromiumWebBrowser1.Size = new Size(794, 356);
+            chromiumWebBrowser1.Size = new Size(794, 333);
             chromiumWebBrowser1.TabIndex = 0;
             chromiumWebBrowser1.LoadingStateChanged += chromiumWebBrowser1_LoadingStateChanged;
             // 
             // button4
             // 
             button4.Dock = DockStyle.Top;
+            button4.Enabled = false;
             button4.FlatStyle = FlatStyle.System;
             button4.Location = new Point(3, 19);
             button4.Name = "button4";
@@ -244,21 +192,14 @@
             button4.TabIndex = 1;
             button4.Text = "Render preview";
             button4.UseVisualStyleBackColor = true;
-            // 
-            // progressBar1
-            // 
-            progressBar1.Dock = DockStyle.Top;
-            progressBar1.Location = new Point(3, 42);
-            progressBar1.Name = "progressBar1";
-            progressBar1.Size = new Size(794, 2);
-            progressBar1.Style = ProgressBarStyle.Marquee;
-            progressBar1.TabIndex = 2;
+            button4.Click += button4_Click;
             // 
             // button3
             // 
             button3.BackColor = Color.Transparent;
             button3.Dock = DockStyle.Bottom;
-            button3.FlatStyle = FlatStyle.Flat;
+            button3.Enabled = false;
+            button3.FlatStyle = FlatStyle.System;
             button3.Location = new Point(0, 469);
             button3.Name = "button3";
             button3.Size = new Size(800, 23);
@@ -267,44 +208,69 @@
             button3.UseVisualStyleBackColor = false;
             button3.Click += button3_Click;
             // 
+            // groupBox3
+            // 
+            groupBox3.Controls.Add(button2);
+            groupBox3.Controls.Add(textBox2);
+            groupBox3.Dock = DockStyle.Top;
+            groupBox3.Location = new Point(0, 24);
+            groupBox3.Name = "groupBox3";
+            groupBox3.Size = new Size(800, 67);
+            groupBox3.TabIndex = 2;
+            groupBox3.TabStop = false;
+            groupBox3.Text = "Input file";
+            // 
+            // button2
+            // 
+            button2.Dock = DockStyle.Fill;
+            button2.FlatStyle = FlatStyle.System;
+            button2.Location = new Point(3, 42);
+            button2.Name = "button2";
+            button2.Size = new Size(794, 22);
+            button2.TabIndex = 3;
+            button2.Text = "Select file";
+            button2.UseVisualStyleBackColor = true;
+            button2.Click += button2_Click;
+            // 
+            // textBox2
+            // 
+            textBox2.Dock = DockStyle.Top;
+            textBox2.Location = new Point(3, 19);
+            textBox2.Name = "textBox2";
+            textBox2.PlaceholderText = "Type path or select file below. ";
+            textBox2.Size = new Size(794, 23);
+            textBox2.TabIndex = 2;
+            textBox2.TextChanged += textBox2_TextChanged;
+            // 
             // Form1
             // 
             AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
             ClientSize = new Size(800, 492);
-            Controls.Add(button3);
             Controls.Add(groupBox4);
-            Controls.Add(panel1);
+            Controls.Add(groupBox3);
+            Controls.Add(button3);
             Controls.Add(menuStrip1);
             MainMenuStrip = menuStrip1;
             MinimumSize = new Size(633, 531);
             Name = "Form1";
             Text = "MintHTML";
+            FormClosed += Form1_FormClosed;
             Load += Form1_Load;
-            panel1.ResumeLayout(false);
-            groupBox3.ResumeLayout(false);
-            groupBox3.PerformLayout();
-            groupBox2.ResumeLayout(false);
-            groupBox2.PerformLayout();
             menuStrip1.ResumeLayout(false);
             menuStrip1.PerformLayout();
             groupBox4.ResumeLayout(false);
+            groupBox3.ResumeLayout(false);
+            groupBox3.PerformLayout();
             ResumeLayout(false);
             PerformLayout();
         }
 
         #endregion
-        private Panel panel1;
         private MenuStrip menuStrip1;
         private ToolStripMenuItem fileToolStripMenuItem;
         private ToolStripMenuItem helpToolStripMenuItem;
         private ToolStripMenuItem aboutToolStripMenuItem;
-        private GroupBox groupBox2;
-        private TextBox textBox1;
-        private Button button1;
-        private GroupBox groupBox3;
-        private Button button2;
-        private TextBox textBox2;
         private OpenFileDialog Opener;
         private SaveFileDialog Saver;
         private GroupBox groupBox4;
@@ -317,5 +283,10 @@
         private ToolStripMenuItem sansSerifToolStripMenuItem;
         private ToolStripMenuItem forceMonospaceToolStripMenuItem;
         private ProgressBar progressBar1;
+        private ToolStripMenuItem openDevToolsToolStripMenuItem;
+        private ToolStripMenuItem exitToolStripMenuItem;
+        private GroupBox groupBox3;
+        private Button button2;
+        private TextBox textBox2;
     }
 }
diff --git a/Form1.cs b/Form1.cs
index f8ddae5..dfbfe90 100644
--- a/Form1.cs
+++ b/Form1.cs
@@ -5,6 +5,44 @@ namespace MintHTML
 {
     public partial class Form1 : Form
     {
+        string markfile;
+        string htmlfile = "<h1>Welcome to MintHTML</h1><p>Open a markdown file and press \"Render preview\" to see the output here.</p>";
+        string csssuffix = @"
+div{
+font-family: monospace;
+background-color: #F3F3F3;
+border: solid;
+border-width: 1px
+}
+</style>";
+        string css;
+        // Custom functions
+        private void convert()
+        {
+            htmlfile = "";
+            using (StringReader reader = new StringReader(markfile))
+            {
+                string line;
+                while ((line = reader.ReadLine()) != null)
+                {
+                    if (line.Contains("# "))
+                    {
+                        line = "<h1>" + line[1..] + "</h1>";
+
+                    }
+                    else if (line.Contains("`"))
+                    {
+                        line = "<div>" + line[1..^1] + "</div>";
+                    }
+                    else
+                    {
+                        line = line + "<br>";
+                    }
+                    htmlfile += line;
+                }
+            }
+        }
+        // Custom functions end
         public Form1()
         {
             InitializeComponent();
@@ -19,28 +57,102 @@ namespace MintHTML
         {
             Opener.ShowDialog();
             textBox2.Text = Opener.FileName;
-        }
-
-        private void button1_Click(object sender, EventArgs e)
-        {
-            Saver.ShowDialog();
-            textBox1.Text = Saver.FileName;
-
-        }
-
-        private void chromiumWebBrowser1_LoadingStateChanged(object sender, CefSharp.LoadingStateChangedEventArgs e)
-        {
-
+            if (textBox2.Text.Length > 0)
+            {
+                markfile = File.ReadAllText(textBox2.Text);
+                convert();
+                chromiumWebBrowser1.LoadHtml(css + htmlfile);
+            }
         }
 
         private void Form1_Load(object sender, EventArgs e)
         {
-            chromiumWebBrowser1.LoadHtml("<style>html{font-family: sans-serif}</style><h1>MintHTML</h1><p>Open a markdown file and press \"Render preview\" to see the output here.</p>");
+            css = @"<style>
+html{
+font-family: sans-serif
+}" + csssuffix;
+            chromiumWebBrowser1.LoadHtml(css + htmlfile);
         }
 
         private void button3_Click(object sender, EventArgs e)
         {
 
         }
+
+        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
+        {
+            Cef.Shutdown();
+        }
+
+        private void chromiumWebBrowser1_LoadingStateChanged(object sender, LoadingStateChangedEventArgs e)
+        {
+            this.Invoke(new Action(() => progressBar1.Visible = chromiumWebBrowser1.IsLoading));
+        }
+
+        private void openDevToolsToolStripMenuItem_Click_1(object sender, EventArgs e)
+        {
+            chromiumWebBrowser1.ShowDevTools();
+        }
+
+        private void button4_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                markfile = File.ReadAllText(textBox2.Text);
+                convert();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+            chromiumWebBrowser1.LoadHtml(css + htmlfile);
+        }
+
+        private void textBox2_TextChanged(object sender, EventArgs e)
+        {
+            button3.Enabled = textBox2.Text.Length > 0;
+            button4.Enabled = textBox2.Text.Length > 0;
+        }
+
+        private void serifToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            css = @"<style>
+html{
+font-family: serif
+}" + csssuffix;
+            sansSerifToolStripMenuItem.Checked = false;
+            forceMonospaceToolStripMenuItem.Checked = false;
+            serifToolStripMenuItem.Checked = true;
+            chromiumWebBrowser1.LoadHtml(css + htmlfile);
+        }
+
+        private void groupBox4_Enter(object sender, EventArgs e)
+        {
+
+        }
+
+        private void sansSerifToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            css = @"<style>
+html{
+font-family: sans-serif
+}" + csssuffix;
+            sansSerifToolStripMenuItem.Checked = true;
+            forceMonospaceToolStripMenuItem.Checked = false;
+            serifToolStripMenuItem.Checked = false;
+            chromiumWebBrowser1.LoadHtml(css + htmlfile);
+        }
+
+        private void forceMonospaceToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            css = @"<style>
+html{
+font-family: monospace
+}" + csssuffix;
+            sansSerifToolStripMenuItem.Checked = false;
+            forceMonospaceToolStripMenuItem.Checked = true;
+            serifToolStripMenuItem.Checked = false;
+            chromiumWebBrowser1.LoadHtml(css + htmlfile);
+        }
     }
 }