diff --git a/js/editor/main.js b/js/editor/main.js
index fdc5f61..b278fa7 100644
--- a/js/editor/main.js
+++ b/js/editor/main.js
@@ -208,12 +208,18 @@ export class Editor extends PrimaryView {
                     }
                 }
                 else if (ev.key === '-') {
-                    this.zoom_by(-1);
+                    if (this.mouse_coords)
+                        this.zoom_by(-1, this.mouse_coords[0], this.mouse_coords[1]);
+                    else
+                        this.zoom_by(-1);
                 }
                 // `=` because US keyboards have `+` on the same key as `=`, and `+` is shift-`=`
                 // `+` because many other keyboards have `+` on its own key, un-shifted, while `=` is shifted
                 else if (ev.key === '=' || ev.key === '+') {
-                    this.zoom_by(+1);
+                    if (this.mouse_coords)
+                        this.zoom_by(+1, this.mouse_coords[0], this.mouse_coords[1]);
+                    else
+                        this.zoom_by(+1);
                 }
                 else if (ev.key === '1') {
                     this.set_canvas_zoom(1);