diff --git a/public/app.mjs b/public/app.mjs
index 1be1422..14433ee 100644
--- a/public/app.mjs
+++ b/public/app.mjs
@@ -1625,8 +1625,9 @@ function open_inventory_dialog(entry = null, default_component_id = null, defaul
 	const new_comp_btn = qs(dlg, '#i-new-component');
 	const grid_row_div = qs(dlg, '#i-grid-row');
 	const grid_sel = qs(dlg, '#i-grid-select');
-	const row_num_input = qs(dlg, '#i-grid-row-num');
-	const col_num_input = qs(dlg, '#i-grid-col-num');
+	const grid_visual = qs(dlg, '#i-grid-visual');
+	let picker_row = null;
+	let picker_col = null;
 
 	title.textContent = entry ? 'Edit inventory entry' : 'Add inventory entry';
 
@@ -1659,8 +1660,44 @@ function open_inventory_dialog(entry = null, default_component_id = null, defaul
 		}))
 	);
 	if (effective_grid_cell?.grid_id) { grid_sel.value = effective_grid_cell.grid_id; }
-	row_num_input.value = effective_grid_cell?.grid_row != null ? effective_grid_cell.grid_row + 1 : 1;
-	col_num_input.value = effective_grid_cell?.grid_col != null ? effective_grid_cell.grid_col + 1 : 1;
+	picker_row = effective_grid_cell?.grid_row ?? null;
+	picker_col = effective_grid_cell?.grid_col ?? null;
+
+	function rebuild_grid_visual() {
+		const grid = all_grids.find(g => g.id === grid_sel.value);
+		if (!grid) { grid_visual.replaceChildren(); return; }
+		grid_visual.style.gridTemplateColumns = `repeat(${grid.cols}, 1fr)`;
+		const cells = [];
+		for (let r = 0; r < grid.rows; r++) {
+			for (let c = 0; c < grid.cols; c++) {
+				const cell = document.createElement('div');
+				cell.className = 'igv-cell';
+				if (r === picker_row && c === picker_col) cell.classList.add('igv-selected');
+				const filename = grid.cells?.[r]?.[c];
+				if (filename) {
+					const img = document.createElement('img');
+					img.src = `/img/${filename}`;
+					img.className = 'igv-img';
+					cell.appendChild(img);
+				}
+				cell.addEventListener('click', () => {
+					picker_row = r;
+					picker_col = c;
+					grid_visual.querySelectorAll('.igv-cell').forEach(el => el.classList.remove('igv-selected'));
+					cell.classList.add('igv-selected');
+				});
+				cells.push(cell);
+			}
+		}
+		grid_visual.replaceChildren(...cells);
+	}
+
+	rebuild_grid_visual();
+
+	const old_grid_handler = grid_sel._change_handler;
+	if (old_grid_handler) grid_sel.removeEventListener('change', old_grid_handler);
+	grid_sel._change_handler = () => { picker_row = null; picker_col = null; rebuild_grid_visual(); };
+	grid_sel.addEventListener('change', grid_sel._change_handler);
 
 	function update_ref_label() {
 		ref_label.textContent = ref_label_for_type(type_sel.value);
@@ -1700,8 +1737,8 @@ function open_inventory_dialog(entry = null, default_component_id = null, defaul
 			quantity: qty_input.value.trim(),
 			notes: notes_input.value.trim(),
 			grid_id: is_grid ? (grid_sel.value || null) : null,
-			grid_row: is_grid ? parseInt(row_num_input.value) - 1 : null,
-			grid_col: is_grid ? parseInt(col_num_input.value) - 1 : null,
+			grid_row: is_grid ? picker_row : null,
+			grid_col: is_grid ? picker_col : null,
 		};
 		if (entry) {
 			const result = await api.update_inventory(entry.id, body);
diff --git a/public/style.css b/public/style.css
index d89b5bd..3178ee6 100644
--- a/public/style.css
+++ b/public/style.css
@@ -1504,15 +1504,38 @@ nav {
 	gap: 0.4rem;
 }
 
-.i-grid-coords {
-	display: flex;
-	align-items: center;
-	gap: 0.4rem;
-	font-size: 0.9rem;
+.i-grid-visual {
+	display: grid;
+	gap: 2px;
+	max-height: 320px;
+	overflow-y: auto;
 }
 
-.input-narrow {
-	width: 4rem;
+.igv-cell {
+	position: relative;
+	aspect-ratio: 1;
+	background: var(--surface-raised);
+	border: 2px solid transparent;
+	border-radius: 2px;
+	cursor: pointer;
+	overflow: hidden;
+}
+
+.igv-cell:hover {
+	border-color: var(--accent);
+}
+
+.igv-cell.igv-selected {
+	border-color: var(--accent);
+	box-shadow: inset 0 0 0 1px var(--accent);
+}
+
+.igv-img {
+	width: 100%;
+	height: 100%;
+	object-fit: cover;
+	display: block;
+	pointer-events: none;
 }
 
 /* ===== CELL INVENTORY OVERLAY ===== */
diff --git a/public/templates.html b/public/templates.html
index b1a8232..fda93b6 100644
--- a/public/templates.html
+++ b/public/templates.html
@@ -444,12 +444,7 @@
 				<label>Grid cell</label>
 				<div class="i-grid-cell-picker">
 					<select id="i-grid-select" class="filter-select"></select>
-					<div class="i-grid-coords">
-						<label for="i-grid-row-num">Row</label>
-						<input type="number" id="i-grid-row-num" min="1" class="input-narrow">
-						<label for="i-grid-col-num">Col</label>
-						<input type="number" id="i-grid-col-num" min="1" class="input-narrow">
-					</div>
+					<div id="i-grid-visual" class="i-grid-visual"></div>
 				</div>
 			</div>
 			<div class="form-row">