Galaxy: Basics

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 document you want to remove from the selected set.

To select, in an area, 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.
Select the document first; clicking on it with the +V cursor doesn't automatically select it.

To deselect all selected documents
Click the 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 REV SEL button. Documents that are selected will be deselected. Documents that are deselected will be selected.

To make selected documents stand out from the background:
Click the Contrast button, or choose main menu > Settings > 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.

To show/hide document titles individually in both Galaxy and Outliers panel
With the +Ab cursor, SHIFT-click anywhere in the Galaxy.

This doesn't 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
SHIFT-click on it using the +Ab cursor.

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

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.

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

To show/hide cluster centroids
Choose the Cluster Centroid Cursor. If centroids are visible, they will be hidden. If centroids are not visible, they will be shown.

To show cluster terms
Click on a centroid using the Cluster Centroid Cursor. Cluster terms are the three most frequently-occurring terms in the documents belonging to the cluster.

To clear cluster terms
Using the Cluster Centroid Cursor, SHIFT-click anywhere in the Galaxy.

To select all documents in a cluster
CTRL-click on its centroid using the Cluster Centroid Cursor.

To see which documents are in a cluster without selecting them
ALT-click on the cluster centroid using the Cluster Centroid Cursor. While the mouse button is down, the documents in that cluster are drawn in magenta. This is also useful for distinguishing cluster membership when documents in adjacent clusters are selected.

To show/hide a cluster
CTRL-SHIFT-click on the cluster centroid using the Cluster Centroid Cursor. All the documents in the cluster are hidden. The centroid itself is drawn like this:
To show the documents again, CTRL-SHIFT-click again on the centroid using the Cluster Centroid Cursor.

To zoom in
Click anywhere in the Galaxy 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, without affecting pan, selections, or titles
CTRL-SHIFT-click with the Zoom cursor.

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

To reset to original view coordinates, without affecting selections, zoom, or titles
CTRL-SHIFT-click anywhere in the Galaxy.

To change the color of most objects
Choose Settings > Change Colors. See Settings.

To show the ThemeClouds on the Galaxy
Choose main menu > Settings > Galaxy ThemeClouds Visible.

To show ThemeCloud labels on the Galaxy
Choose main menu > Settings > Peak Labels Visible.