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Opens the Annotations panel, where you can select which annotation set to view, name that annotation set, add optional notes about the annotation set, save the annotation set, and reset the panel to its original state.

Drag this tool on the slide to learn the measurement in micrometers.

For a slide with heatmap data, opens the choices of heatmaps available, as well as ways of displaying the heatmaps. The gradient shows all of the values on the selected spectrum for the field you selected.

Choices of heatmaps:

HeatMap displaying a gradient for lym:

Slides with heatmaps have three custom tools in the toolbar.

Tool	Description
	Opens the Edited Data List. Information appears here if the slide has been edited using the HeatMap Editor tool, described below.
	Opens the Heatmap Settings window, where you can turn the gradient display on and off and adjust the property of the gradient. By default, both lymphocyte and necrosis concentrations appear in the heatmap. If you choose to turn the gradient display on by clicking the checkbox, you can choose to display either the lymphocyte or necrosis heatmap by itself. If you display the lymphocyte gradient, you can set its property between 0 and 1. If you display the necrosis gradient, its property is fixed at 1.
	Opens the HeatMap Editor. Select an operation from the list. Each edits the heatmap to show that operation, lym-positive, lym-negative, necrosis-positive, and necrosis-negative, in the specified color.

Use this tool to draw a circle or rectangle around a tumor region, measure an area on the slide, download labels, and submit a bug report. The Labeling tool has its own toolbar with tools in the following order from left to right: return to the previous slide, place a square on the slide, place a circle on the slide, measure an area, download labels, and submit a bug report. Click the left arrow at the far right of the toolbar to hide it, then click the right arrow to show it.

Tool	Description
	Returns you to the previous slide.
	Allows you to place a square-shaped annotation () on the slide to emphasize one block of the heatmap. Hover your mouse over the X icon to show an edit button , which you click to provide notes about your annotation. Hover your mouse over the square annotation to open a color picker you can use to change the color of the square.
	Allows you to place a circle annotation () on the slide to emphasize one block of the heatmap. Hover your mouse over the X icon to show an edit button , which you click to provide notes about your annotation. Hover your mouse over the circle annotation to open a color picker you can use to change the color of the circle.
	Measures an area you select on the slide in micrometers.
	Allows you to download the labels you've added to annotations. The file you download is a zip file that includes JPG and CSV files.
	Allows you to log a bug in a Google Form.

This tool allows you to display, count, and export nuclear segmentations on the image. Clicking this tool opens the following custom toolbar.

Tool	Description
	Click the Segment tool to open the custom toolbar above. Then click the Segment tool again, place your cursor on the image, and select a rectangular area. The Segment tool opens another custom toolbar, which follows, and counts the number of segmented objects in the selected area. Segment Object Toolbar On the Segment Object toolbar, you can do the following tasks. Click to close the Segment Object toolbar. Click to save the segmented objects in the selected area as a Region of Interest (ROI) image file. The file downloads to your default download location. Click to save the segmented objects in the selected area to a Comma-Separated Values (CSV) file. Column headers include AreaInPixels, PerimeterInPixels, and Polygon. The file downloads to your default download location. Click to open the segmentation settings. Image Added Segmentation Settings Options Customize the max area, min area, and threshold of the area containing segmented objects by dragging the slider.
	Returns you to the previous slide.
	Allows you to log a bug in a Google Form.

Click this button after reviewing a slide to change its review status, then confirm the change. A green checkmark appears in the data table for this slide after you have marked it as reviewed.