diff --git a/src/buffer/mod.rs b/src/buffer/mod.rs
index 36f9a03..ceb83c3 100644
--- a/src/buffer/mod.rs
+++ b/src/buffer/mod.rs
@@ -1,7 +1,7 @@
 use core::slice::GetDisjointMutIndex;
 use std::{collections::HashSet, fs::File, io::Read, path::PathBuf};
 use crossterm::event::KeyEvent;
-use ratatui::{layout::{Constraint, Rect}, style::{Color, Stylize}, text::Span, widgets::{Block, Clear, Widget}};
+use ratatui::{layout::{Constraint, Rect}, style::{Color, Style, Stylize}, text::Span, widgets::{Block, Borders, Clear, Widget}};
 use serde::{Deserialize, Serialize};
 use crate::{BYTES_PER_LINE, action::{Action, AppAction, bytes_to_nat}, app::WindowSize, config::Config, cursor::Cursor, edit_action::EditAction};
 
@@ -55,6 +55,7 @@ pub enum PartialAction {
 pub struct Popup {
 	at: usize,
 	width: u16,
+	primary: bool,
 	lines: Vec<Span<'static>>
 }
 
@@ -118,6 +119,7 @@ impl Popup {
 				.map(|line| line.width() as u16)
 				.max()
 				.unwrap_or(0),
+			primary: false,
 			lines
 		}
 	}
@@ -130,17 +132,31 @@ impl Popup {
 			height: self.lines.len() as u16
 		}
 	}
+	
+	#[allow(clippy::wrong_self_convention)]
+	const fn as_primary(mut self) -> Self {
+		self.primary = true;
+		self
+	}
 }
 
 impl Widget for Popup {
 	fn render(self, area: Rect, buf: &mut ratatui::prelude::Buffer) {
+		Clear.render(area, buf);
+		
+		let border_color = if self.primary {
+			Style::new().white()
+		} else {
+			Style::new().gray()
+		};
+		
+		Block::new()
+			.on_dark_gray()
+			.borders(Borders::LEFT | Borders::RIGHT)
+			.border_style(border_color)
+			.render(area, buf);
+		
 		for (line, area) in self.lines.iter().zip(area.rows()) {
-			Clear.render(area, buf);
-			
-			Block::new()
-				.on_dark_gray()
-				.render(area, buf);
-			
 			line.render(
 				area.centered_horizontally(Constraint::Length(line.width() as u16)),
 				buf
diff --git a/src/buffer/widget.rs b/src/buffer/widget.rs
index cee27c0..404fa65 100644
--- a/src/buffer/widget.rs
+++ b/src/buffer/widget.rs
@@ -43,6 +43,9 @@ impl Widget for &Buffer {
 			.right_aligned()
 			.render(status_line_area, buf);
 		
+		let mut primary_popup = None;
+		let mut primary_popup_area = None;
+		
 		for popup in &self.popups {
 			if self.scroll_position <= popup.at &&
 			   popup.at < self.scroll_position + (hex_area.height.saturating_sub(1) as usize * BYTES_PER_LINE)
@@ -57,10 +60,21 @@ impl Widget for &Buffer {
 					)
 					.clamp(hex_area);
 				
+				if popup.at == self.primary_cursor.lower_bound() {
+					primary_popup = Some(popup);
+					primary_popup_area = Some(popup_area);
+				}
+				
 				popup.clone().render(popup_area, buf);
 			}
 		}
 		
+		if let Some(primary_popup) = primary_popup &&
+		   let Some(primary_popup_area) = primary_popup_area
+		{
+			primary_popup.clone().as_primary().render(primary_popup_area, buf);
+		}
+		
 		// if self.partial_action == Some(PartialAction::Space) {
 		// 	let input_field_area = Rect::new(area.x, area.bottom() - 2, area.width, 1);
 		// 	Span::from("/0F673 ")
diff --git a/src/main.rs b/src/main.rs
index c778b55..43b932a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -28,6 +28,8 @@ const LINES_OF_PADDING: usize = 5;
 const BYTES_OF_PADDING: usize = LINES_OF_PADDING * BYTES_PER_LINE;
 
 // TODO:
+// - keep popups for some actions
+// - inspector translations for varint
 // - search
 //   - ascii and bytes (`/` and `A-/`?)
 // - diffing