diff --git a/src/mapedit/mod.rs b/src/mapedit/mod.rs
index 09d369e..d9731c4 100644
--- a/src/mapedit/mod.rs
+++ b/src/mapedit/mod.rs
@@ -423,20 +423,20 @@ pub(crate) fn run_mapedit() {
                         let ye = ys + stuff.gsa1.bg[0].size.y * TILE_SIZE as i32 + 1;
                         if xs >= 16 && xs < screen_size.x {
                             let starty = (ys + 1).max(0);
-                            let len = ye.min(screen_size.y) - starty;
+                            let len = ye.min(screen_size.y - 10) - starty;
                             screen.draw_vline(IVec2 { x: xs, y: starty }, len, 0xfc);
                         }
                         if xe >= 16 && xe < screen_size.x {
                             let starty = (ys + 1).max(0);
-                            let len = ye.min(screen_size.y) - starty;
+                            let len = ye.min(screen_size.y - 10) - starty;
                             screen.draw_vline(IVec2 { x: xe, y: starty }, len, 0xfc);
                         }
-                        if ys >= 0 && ys < screen_size.y {
+                        if ys >= 0 && ys < (screen_size.y - 10) {
                             let startx = (xs + 1).max(16);
                             let len = xe.min(screen_size.x) - startx;
                             screen.draw_hline(IVec2 { x: startx, y: ys }, len, 0xfc);
                         }
-                        if ye >= 0 && ye < screen_size.y {
+                        if ye >= 0 && ye < (screen_size.y - 10) {
                             let startx = (xs + 1).max(16);
                             let len = xe.min(screen_size.x) - startx;
                             screen.draw_hline(IVec2 { x: startx, y: ye }, len, 0xfc);