Galaxy: Basics

Unselected document in the Galaxy.

Selected document in the Galaxy.

Document selected in Galaxy is currently visible in the Document Viewer.

Document that has been previously viewed in the Document Viewer.

Documents that have been grouped with the Groups tool.  Group colors will vary.

Document title or file name shown by selecting document with the Titles tool.

Peak labels.

Cluster centroid.

Probe arrow and resulting label.

To select documents individually
Use the +S cursor. Ctrl-click documents to add documents to the selected set.
Ctrl-Shift-click on a document to remove it from the selected set.

To select all documents in an area
Use the +S cursor. Click and drag a rectangle around the documents you want to select.
Ctrl-Shift-drag a rectangle around a document or documents you want to remove from the selected set.

To select only documents belonging to Groups
Alt-click and drag a rectangle around them.

To view a document
Select the document(s) using the +S cursor, then use the +V cursor to click on one of the selected document dots. The Document Viewer opens. All of the selected documents are listed; the document clicked on with the +V cursor is visible.
Note: Select the document first; clicking on it with the +V cursor does not automatically select it.

To deselect all selected documents
Click the Clear Selection (CLR SEL) button, or, with the S+ cursor, Shift-click anywhere in the galaxy. All the selected documents will be deselected in the Galaxy and all tools (no documents will be selected).

To select the inverse of the documents currently selected
Click the Reverse Selection (REV SEL) button. Documents that are selected will be unselected. Documents that are not selected will be selected.

To make selected documents stand out from the background
Click the Contrast button, or choose View > Contrast.

To show Grouped documents in their group colors
Highlight the groups in the Groups Tool.

To group some documents
First select the documents, then open the Groups Tool or use the Queries tool. For a discussion of all the ways to create and modify groups by adding and subtracting members, see the Groups Tool.

Showing Document Titles

To show/hide document titles individually in both the Galaxy and Outliers panel, select the +Ti cursor and click on a document point in the Galaxy.

Note: This does not toggle titles on and off; to see the same titles again, you will have to turn them on again one-by-one.

To clear (hide) a document title
Click on it using the +Ti cursor.

To see the titles of all outlier documents
Choose View > Outlier Titles. Outlier documents are drawn in a vertical list, showing the title of each.

To hide all document titles

Click Reset All.

Showing What Terms Occur in an Area of the Galaxy

Use the Summary button to display the contributions of various terms to the ranking of selected documents in the dataset.

To see a list of terms and their frequency of occurrence in a particular area
Use the Probe Cursor to click on the Galaxy, or the ThemeView, in the area of interest. For more information, see Probe Tool.

Working with Clusters

Cluster centroids represent the mathematical center of all the documents in a cluster. To get oriented in a new dataset, it may be helpful to turn on cluster centroids.

To show/hide cluster centroids
From the Galaxy toolbar, select View > Cluster Centroids. The centroids will display as small circles.  

To turn off centroids, select Cluster Centroids again.  

Moving the mouse over a cluster centroid will display the cluster membership without selecting the documents. To add the documents in the cluster to the selected document set, Ctrl-click on a cluster centroid. To remove the documents from the selected document set, Ctrl-Shift-Click on a cluster centroid.

Homing In On Areas of Interest

To zoom in
Click anywhere in the Galaxy dataset display using the Zoom cursor. Each time you click, the view zooms in a little more.

To enlarge an area of the Galaxy
Using the Zoom cursor, click and drag a rectangle around the area of interest. Release the mouse button.

To zoom out
Ctrl-click with the Zoom cursor. Each time you Ctrl-click, the view zooms out a little more.

To reset to the original magnification, selections, or titles
Ctrl-Shift-click with the Zoom cursor.

To revert to the default view options
Click the Reset All button.

To pan the view
Using the Pan cursor, click and drag the Galaxy view.

To reset to original view coordinates, without affecting selections, or titles
Ctrl-Shift-click anywhere in the Galaxy.