diff --git a/app/src/block/Panel.ts b/app/src/block/Panel.ts
index 788d301ea..eba7ed9ee 100644
--- a/app/src/block/Panel.ts
+++ b/app/src/block/Panel.ts
@@ -294,6 +294,7 @@ export class BlockPanel {
                         setPosition(this.element, targetRect.left, targetRect.bottom + 4, targetRect.height + 12, 8);
                     } else if (typeof this.x === "number" && typeof this.y === "number") {
                         setPosition(this.element, this.x, this.y);
+                        this.element.style.maxHeight = Math.floor(window.innerHeight - Math.max(this.y, Constants.SIZE_TOOLBAR_HEIGHT) - 12) + "px";
                     }
                     const elementRect = this.element.getBoundingClientRect();
                     if (this.targetElement && !this.targetElement.classList.contains("protyle-wysiwyg__embed")) {