diff --git a/css/index.css b/css/index.css
index 679771f..13bc49a 100644
--- a/css/index.css
+++ b/css/index.css
@@ -30,52 +30,6 @@ body {
 	grid-row-gap: 5px;
 }
 
-.button-array {
-	display: flex;
-	justify-content: stretch;
-}
-
-.button-array > .button.tool {
-	flex: 1;
-	border-radius: 0;
-}
-
-.button-array > .button.tool:first-child {
-	border-top-left-radius: 5px;
-	border-bottom-left-radius: 5px;
-}
-
-.button-array > .button.tool:last-child {
-	border-top-right-radius: 5px;
-	border-bottom-right-radius: 5px;
-}
-
-.button.tool {
-	background-color: rgb(0, 0, 50);
-	color: rgb(255, 255, 255);
-	border-radius: 5px;
-	cursor: pointer;
-	border: none;
-	text-align: center;
-	outline: none;
-	font-size: 15px;
-	padding: 5px;
-	margin-top: 5px;
-	margin-bottom: 5px;
-}
-
-.button.tool:disabled {
-	background-color: #666 !important;
-	cursor: default;
-}
-
-.button.tool:hover {
-	background-color: rgb(30, 30, 80);
-}
-.button.tool:active {
-	background-color: rgb(60, 60, 130);
-}
-
 .collapsible {
 	background-color: rgb(0, 0, 0);
 	color: rgb(255, 255, 255);
@@ -157,6 +111,10 @@ body {
 	filter: invert(100%);
 }
 
+.maskPaintCanvas.display.opaque {
+	opacity: 100%;
+}
+
 .maskPaintCanvas.display.clear {
 	filter: invert(71%) sepia(46%) saturate(6615%) hue-rotate(321deg)
 		brightness(106%) contrast(100%);
@@ -260,3 +218,51 @@ div.prompt-wrapper > textarea {
 div.prompt-wrapper > textarea:focus {
 	width: 700px;
 }
+
+/* Tool buttons */
+
+.button-array {
+	display: flex;
+	justify-content: stretch;
+}
+
+.button-array > .button.tool {
+	flex: 1;
+	border-radius: 0;
+}
+
+.button-array > .button.tool:first-child {
+	border-top-left-radius: 5px;
+	border-bottom-left-radius: 5px;
+}
+
+.button-array > .button.tool:last-child {
+	border-top-right-radius: 5px;
+	border-bottom-right-radius: 5px;
+}
+
+.button-array > .button.tool {
+	background-color: rgb(0, 0, 50);
+	color: rgb(255, 255, 255);
+	cursor: pointer;
+	border: none;
+	text-align: center;
+	outline: none;
+	font-size: 15px;
+	padding: 5px;
+	margin-top: 5px;
+	margin-bottom: 5px;
+}
+
+.button-array > .button.tool:disabled {
+	background-color: #666 !important;
+	cursor: default;
+}
+
+.button-array > .button.tool:hover {
+	background-color: rgb(30, 30, 80);
+}
+.button-array > .button.tool:active,
+.button.tool.active {
+	background-color: rgb(60, 60, 130);
+}
diff --git a/js/ui/tool/maskbrush.js b/js/ui/tool/maskbrush.js
index 169f502..90ef9bb 100644
--- a/js/ui/tool/maskbrush.js
+++ b/js/ui/tool/maskbrush.js
@@ -93,6 +93,8 @@ const maskBrushTool = () =>
 
 			// Hide Mask
 			setMask("none");
+			state.ctxmenu.previewMaskButton.remove("active");
+			maskPaintCanvas.classList.remove("opaque");
 		},
 		{
 			init: (state) => {
@@ -146,9 +148,46 @@ const maskBrushTool = () =>
 					);
 					state.ctxmenu.brushSizeSlider = brushSizeSlider.slider;
 					state.setBrushSize = brushSizeSlider.setValue;
+
+					// Some mask-related action buttons
+					const actionArray = document.createElement("div");
+					actionArray.classList.add("button-array");
+
+					const clearMaskButton = document.createElement("button");
+					clearMaskButton.classList.add("button", "tool");
+					clearMaskButton.textContent = "Clear";
+					clearMaskButton.title = "Clears Painted Mask";
+					clearMaskButton.onclick = () => {
+						maskPaintCtx.clearRect(
+							0,
+							0,
+							maskPaintCanvas.width,
+							maskPaintCanvas.height
+						);
+					};
+
+					const previewMaskButton = document.createElement("button");
+					previewMaskButton.classList.add("button", "tool");
+					previewMaskButton.textContent = "Preview";
+					previewMaskButton.title = "Displays Mask with Full Opacity";
+					previewMaskButton.onclick = () => {
+						if (previewMaskButton.classList.contains("active")) {
+							maskPaintCanvas.classList.remove("opaque");
+						} else {
+							maskPaintCanvas.classList.add("opaque");
+						}
+						previewMaskButton.classList.toggle("active");
+					};
+
+					actionArray.appendChild(clearMaskButton);
+					actionArray.appendChild(previewMaskButton);
+
+					state.ctxmenu.previewMaskButton = previewMaskButton;
+					state.ctxmenu.actionArray = actionArray;
 				}
 
 				menu.appendChild(state.ctxmenu.brushSizeSlider);
+				menu.appendChild(state.ctxmenu.actionArray);
 			},
 			shortcut: "M",
 		}