Galaxy

An unselected document.

A selected document.

The document that is currently readable in the Document Viewer.

A document that has been previously viewed in the Document Viewer but which is not now selected. A selected document that has been previously viewed is represented by a green "x".

Documents that have been grouped with Groups. In the Galaxy, a grouped document will be shown in the color of its group.

Document title or file name shown by selecting a document with the +Ti (Titles) cursor. If the document is selected, the title will be green, as shown here; otherwise, the title will be the peak label color (usually white).

Topics strong in this area of the Galaxy.

A cluster centroid.

Probe arrow and resulting label.

To select documents individually
To select documents individually, use the arrow cursor. CTRL-click or SHIFT-click documents to add documents to the selected set.

To select all documents in an area
Click and drag a rectangle around the documents you want to select.
ALT-drag a rectangle around a document or documents you want to remove from the selected set.

To show Grouped documents in their group colors
Highlight the groups in the right sidebar.

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

Showing Document Titles

To be able to see document titles in Galaxy, click the Titles button and use the titles cursor to click on a document in the Galaxy.

This does not toggle titles on and off. It just lets you turn them on/off individually.

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

To hide all document titles

Click Reset All.

Showing What Terms Occur in an Area of the Galaxy

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

Working with Clusters

A cluster centroid represents the mathematical center of the plot of all the documents that have been clustered together. To get oriented in a new dataset, it may be helpful to turn on cluster centroids.

To show/hide cluster centroids
If cluster centroids are visible, you can select documents by cluster instead of by area, which can be helpful when clusters overlap each other. Select Settings> Hide/Show Cluster Centroids to make cluster centroids visible (the checkbox will be selected). The centroids will appear to be small circles.

To turn off centroids, select Settings> Hide/Show Cluster Centroids again.

Moving the mouse over a cluster centroid will highlight the documents in the cluster without selecting them. To add the documents in the cluster to the selected document set, CTRL-click on the cluster centroid. To remove the documents from the selected document set, ALT-click on the 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.